Thomas Scherrer UHF 433Mhz Long Range FPV System TSLRS TX RC Transmitter TX700 PRO
With this transmitter you will get professional performance! The transmitter has three power stages, 500mW, 1W or 2W output power to secure your range and signal. This transmitter is used by space agencies, rescuer missions and government FEMA and have flown distance of over 100km.
Along with these range abilities we have of course also custom designed a digitally encrypted ID code, sequential failsafe and frequency hopping to secure your UAV and improve your flights.
With the Tx700Pro you will get the ultimate transmitter on the market.
The Tx700 features all the good know functions from previous versions, but with the new hardware and software. It comes packed with all the well known features and a lot of new such as
- Support Fixed/Variable PPM input
- Futaba input, all up to 12 channels
- Head tracker input
- AUX input (for option boards)
- Option board port
- Output power switch
- Firmware update port
- Status Led
- Military standard input plugs with screw protection
The TX700 comes in a new design that reduces the height dramatically.
It has also sequential fail safe, that lets you store a fail-safe pattern of 3 interactions when it hits fail safe. Through the firmware port you can access TSLRS debug tools for viewing amounts of fail-safes, blocked channels, diversity performance and much more (TSLRS USB programer needed).
Manual for Thomas Scherrer UHF Long Range Tx System
HARDWARE TX UNIT, with powerup feature
the TX unit is designed for 5-25V supply, consume 1.5Watt at any input voltage (500mW RF out) due to the low loss switchmode converter
input voltage must be at least 6V to be able to get full power out is selected
the TX needs only 3 signals : GND=shield, +supply=red, PPM=black.
Damage will ocur if reverse powered or if supply higher than 25V
all TX units are shipped fully cased and fully programmed and tested,
the customer must purchase a trainer plug seperatly, make sure it fits their RC unit type, find pin out information and solder it them self.
a good link to RC units and their pinouts is here : http://users.belgacom.net/TX2TX/tx2tx/english/tx2txgb3.htm
Some customers have repported the 3.5mm jack pin out to be different:
1 GND, 2 not used, 3 PPM in/out (this is the way several Graupner JR Spectrum users have found it working)
Normally this kind of connector is not numbered but named like this
1 shield or body often used as ground, 2 tip or top, 3 centre or middle pad or many other things.
For X9303 or similar JR, Graupner, Spectrum systems, use a mono connector to power up the unit in student mode with internal RF disabled
1 GND, 2 PPM out
Normally this kind of connector is not numbered but named like this
1 shield or body often used as ground, 2 tip or top
If your RC system have a multi pin trainer connector, it most likely have powersupply output too,
look in RC unit manual and connect the 3 wires to LRS correct, please measure the supply voltage is correct so you dont damage anything
if you swap supply voltage to the LRS you will fry it ! if you short power from your RC unit you will melt and fry connections in it !
Some RC units have only the PPM signal out, normally in a 2.5 or 3.5mm jack, look in RC unit manual to find the pin connections
the LRS TX unit can be powered with a seperate battery back like pictures here, it is important to connect power and signal ground like this
ABOUT BINDING !! if you use a SEPERATE battery pack for the LRS TX box, keep the RC unit ON all the time, and power only the LRS TX box up and down while you press the button,
is explained in the normal binding procedure,
now binding will work, since it is the LRS TX unit at power up – button check, that activate binding..
All TX units have from factory installed a 3 power level switch 0.5W 1W and 2W
The 2W setting is now improved and can be used for longer duration
I suggest 2W is used for 30 min max, on TX normal case
and 3 hrs max with TX PRO.
The powerup feature is designed to be used only af a plane saver in case default power is just under limit,
It is not smart to fly far away until radio control is lost and then trust the powerup feature will always save you !
it is ment as an emergency back up that can if lucky save you, same as a seatbelt or airbag 🙂
The booster have the option to be supplied with different supply voltage and can then give you a 6 to 10dB
power up change when a switch is pressed, that will give you enough power change to be able to make a full save plane
in case all RC range have been used.
Bind / Failsafe storing, push button is located to the left of BNC connector
TX BATTERY LIFE The TX unit draw about 1.5W as mentioned at 500mW out, to find the current it draw we use ohms law,
Watt / SupplyVolt = Current, the supply voltage can be anything from 6-25V. Example with a 3S lipo: 1.5W / 11V = 0.126A
To find the time you can run with a given battery size,
take your battery mAh and divide with current usage also in mA
Example: 1000mAh / 126mA = 7.9 hrs, remember to keep a good safe margin, some batteryes like LIPO do not like to be fully empty.
When using the powerup feature input supply power will also go up ! the unit have about 30-40% efficiency, so an easy rule is the input usage
is 3 times as much power as the output power. At 2W RF out, the unit consume almost 6W, this means 4W is wasted as heat, and input current is
0.75A at 8V, and 0.5A at 12V, and 0.25A at 24V, most RC units run at 7-10-12V I guess.
The TX unit can deliver 500mW out at only 5V as supply voltage, it will stop working at 3.3V or under.
For 1W and 2W output, you need supply voltage of at least 6V. Maximum is 25V !
HARDWARE RX UNIT (version 4.02 RX LR Long Range for FPV flights)
The RX unit is designed for 4-6V supply (4 -5 nimh cells or 5V BEC)
Full performance is expected in the 4-6V range
Supply current at 5V = 128mA
RF senstivity = -113 to -114 dBm at 10% BER (or better)
Damage will ocur if reverse supply voltage and if supply is higher than 9V.
Two LED indicators show what antenna is the best right now.
Two MCX coax dipole wire antennas are supplied with each RX this type
This new receiver have much better input filter and will now handle video transmitters at 900 1300 2400MHz much better than anything you have seen before
Attenuation at 430 to 440 MHz passband under 0.9dB
Attenuation at 900MHz 47dB
Attenuation at 1300MHz 75dB
Attenuation at 2400MHz 53dB
This is much better over a saw filter but also bigger and more expensive.
This section is ment to be used by experts and is a bit technical.
the CH12 connector have 4 pins have the pinout from left:
RSSI analog out – ch12 or PPM out – Servo Power Supply – Ground
the RSSI signal can be used with OSD systems
Channel 12 PPM or Servo signal
The NORMAL version of the firmware in all receiver types,
is made to auto switch from PPM out to servo signal channel 12 out, on the ch12 connector,
this way the RX can be used with 12 normal servoes if needed.
However some new microcopter projects now support 12ch PPM for all sorts of usefull features
a SPECIAL PPM fixed out firmware is available on request, ask for this when ordering,
or upgrade the RX your self is also possible, using a serial port level converter.
Note about RSSI signal loading : a version 4.02 LR RX have RSSI signal buffer
so you can load it with whatever you like directly, no need for series resistors
The RSSI voltage from the LRS RX is about 0.5 to 1.0 Volt from bad to best, you need to calibrate your OSD so it readout 0-100% for this voltage range
or bargraphs or what ever is possible, I expect this should be explained in your OSD or logger manual.
RX SERVO Supply current
Normal servo connectors and supply connectors used for RX systems, are designed to handle max 2A each
so in a multible servo system remember to add all peak currents
and be sure your supply connector is not overloaded. Large scale planes often uses powerboxes to solve this normal problem
you can parallel some servo connectors supply and ground to be able to handle more supply current to your system
This system uses wide band frequency hopping in the two free ISM bands 433 and 444MHz.
To make this system secure each tx units in same area must use different ID code
so they will use dirrerent frequency and different hopping system,
more systems can opperate on the same field at the same time with 100% performance.
(it is possible to use any frequency sets in the 410 to 450mhz band on request)
The calculated line of sight range is 100km.
To give you a good safety margin stay within 5km (with 500mW standard version and little whip)
the 7W booster give you at least 15km range with whip antenna.
both ranges mentioned can be tribbled or even more, if you use a larger and better antenna or even a directional type on the TX side.
can be done just like conventional RC systems, in this case simply unmount the TX antenna, and set it to low power,
then expect 4-10 meters of range, then check you have same (short) range with motor on/off,
and with video cams and video transmitters on/off, if no change in the range result, then mount TX antenna again and fly.
INSTALLATION The TX box is a small metal case 58mm wide, 72 mm long, 27 mm height, it is supposed to be mounted on your convertional RC unit.
but it can also be mounted some where else using a long cable for the power and PPM signal.
The RX is installed just like any conventional RX
The two RX antennas (on LR receiver) is supposed to be mounted so at least one of them can always be seen from ground,
mount the two antennas 90 degree angle to each other.
If receiver antennas are mounted horizontal in plane –
then longest range is also achived holding tx antenna horizontal and vice versa.
it could be smart to mount one antenna vertical and one horizontal if possible.
it is ok to cut the antenna wire and solder (same length) stiff piano wire so when vertical mounted it will be straight while flying.
Landscape variations and noise polution in the flight area is known to shorten the range of any wireless link.
Use at least 1/10 of the distance as height. for example at 3km distance stay 300meters up to get full range.
Standard transmitter with 500mW and the standard quaterwave antenna will give you a 3-5km range, in normal city area,
may be much longer in areas with no noise polution.
WARNING and DISCLAMER
when using any wireless RC system bad things can happen, batteries can fail, hardware can fall out of planes,
and many other things, what ever bad happens, I can not be held financial or personal responsible,
you agree to this by using this system !
Trouble shooting LRS install and FPV stuff in general
Turn off all video transmitters and cameras in your plane,
try the bind and store failsafe, and then double check all servoes
are nice and stable and fast reacting, if this is true you proceed to 2
if not fix or complain or ask me
turn on video tx and camera and gps and osd, see if any change in perfect servo movement
try to make the mentioned range checks in the manual, if all pass goto 3
if rangechecking shows problems you have a bad video tx or bad camera system or problems with
power supply or problems with video tx radiate bad harmonics, you must try to fix that somehow.
fix problems and goto 1:
3: fly and be happy
http://www.vimeo.com/3794673 show how the diversity system select the best antenna signal,
TX side run a servo test program so we can see all updates go fine while shifting antenna.
TSLRS Thomas Scherrer UHF 433 LRS System How to bind and store failsafe
Thomas Scherrer UHF RC LRS system is tested so far with those RC units
- Multiplex Royal Evo series 7/9/12 (5 pin DIN 2=supply out, 4=ppm out, 3&5=gnd & must be jumped together)
- Multiplex Royal Evo Pro series 7/9/12 (5 pin DIN 2=supply out, 4=ppm out, 3&5=gnd & must be jumped together)
- Multiplex Cockpit SX (5 pin DIN 2=supply out, 4=ppm out, 3&5=gnd & must be jumped together)
- Multiplex Profi MC3010/3030/4000 (5 pin DIN 2=supply out, 4=ppm out, 3&5=gnd & must be jumped together)
- Hitech Aurora 9, take out normal RF module and use module pins from left : 1=ppm, 2=supply, 3=GND (4 and 5 are not used)
- Hitech Eclipse 7 (it works fine, see post 5797 and a bit more)
- Futaba 6EX 2.4GHz version, is ok (6 pin square)
- Futaba 6EX 72MHz version, is ok (6 pin square)
- Futaba T7CAP (6 pin square)
- Futaba FF7 (6 pin square)
- Futaba 8FG
- Futaba T9CP (6 pin square) same as T9CHP
- Futaba T9ZHP (6 pin round DIN)
- Futaba T9ZAP
- Futaba 10C (6 pin square)
- Futaba 10CG (6 pin square), Sensitive to RF levels, not good to mount LRS TX directly on its back
- Futaba 10CP (6 pin square), Sensitive to RF levels, not good to mount LRS TX directly on its back
- Futaba 10CAP (6 pin square), Sensitive to RF levels, not good to mount LRS TX directly on its back
- Futaba 12ZAP ok in PPM8 & PPM12 no power out in trainer connector (12ch only good in non trainer mode, and be sure max +60% on all channels)
- Futaba 12FGA fine in 8ch mode,possible in 12ch mode with a bit of tricks, see forum
- Futaba 12FG fine in 8ch mode, possible in 12ch mode with a bit of tricks, see forum
- Futaba 14MZ ok in PPM8 mode, PPM12 ch needs work-arround
- Futaba FX18
- Futaba FX30
- Robbe Futaba FC28
- Hitec Optic 6
- Spectrum DX5e – DX6i – DX7 (3.5mm jack) see note 1
- Spectrum DX7SE DO NOT WORK, ONLY DSM MODE; NO PPM OUT MODE NOT EVEN INTERNALLY
- Spectrum DX8 – a little bit of EMC jamming at 2W and if the TX antenna is close to the spectrum (3.5mm jack)
- SANWA RD8000 – (5 pin DIN 1=supply out, 2=gnd, 3=ppm out) all 8ch ppm out of the sanwa is ok
- Graupner MX12 – MX16S (3.5mm jack) see note 1
- Graupner MC22 – MX22 – MC24 – MX24 (3.5mm jack) see note 1B
- JR 3810 see note 1
- JR 9303 see note 2
- X 9303 the special 2.4GHz version, problem solved see note 3
- Turnigy 9X, some seems to handle strong RF signals poorly, like cell phone too close and LRS TX too close, affect display first
- ArtTech E-Fly100C, same 3.5mm jack as Graupner, this radio is only 6ch but works fine
- Mile High Wings USB interface (a PPM generator) fully compatible
- Endurance PCTx (a USB PPM generator.) fully compatible
More planned to be listed here soon, if you test the LRS with an RC system that is not mentioned here, please inform me so I can add it to the list, and you will earn 20 $ to your paypal !
WARNING FUTABA owners must read post 1573-1574
all LRS TX units shipped after 1 sep 2008 will be compatible
pre 1 sep units can be modified with a resistor, ask me for instructions if needed.
Some Graupner units with over 9ch may give problems, do not use PPM24 mode, use PPM18
all LRS TX units shipped after 1 dec 2008 will be compatible
pre 1 dec units can be upgraded with a firmware file, ask me for instructions if needed.
all LRS TX units shipped after 26 march 2009 will be compatible
pre 26 marts units can be modified by changing SMD resistor size 0603 R19 from 68k to 10k, ask me for instructions if needed.
This mod might also work with other JR type of transmittersco
- 1 x Thomas UHF signal cable (Thomas UHF V6 transmitters no longer come with signal cables)