Scherrer UHF Tx700Pro User manual

MANUAL
Transmitter, Pro & Lite
Receivers, Long Range & Normal range
Rev 1.0
Rev Date. 09/03/2016

1
Indhold
Foreword TSLRS................................................................................................................................................. 3
Foreword Transmitter ....................................................................................................................................... 3
Technical Specs.................................................................................................................................................. 3
Tx700Pro........................................................................................................................................................ 3
Tx700Lite ....................................................................................................................................................... 4
Inputs/Output connectors Tx700Pro............................................................................................................... 4
Tx700Lite ....................................................................................................................................................... 4
Hardware specifications .................................................................................................................................... 5
Tx700Pro........................................................................................................................................................ 5
Tx700Lite ....................................................................................................................................................... 6
TX BATTERY LIFE ............................................................................................................................................ 6
Physical Dimensions .......................................................................................................................................... 7
Tx700Pro........................................................................................................................................................ 7
Tx700Lite ....................................................................................................................................................... 7
Legal Information .............................................................................................................................................. 7
Adapter wiring................................................................................................................................................... 7
Binding in details ............................................................................................................................................... 8
Change unique ID code...................................................................................................................................... 8
Tx700Pro........................................................................................................................................................ 8
Tx700Lite ....................................................................................................................................................... 8
Output Power selection button......................................................................................................................... 9
Tx700Pro........................................................................................................................................................ 9
Failsafe............................................................................................................................................................... 9

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Compatibility TX-RX........................................................................................................................................... 9
Compatible RC's................................................................................................................................................. 9
Head Tracker.................................................................................................................................................... 10
Tx700Pro...................................................................................................................................................... 10
Tx700Lite ..................................................................................................................................................... 11
Compatible Head trackers............................................................................................................................... 12
Option Board ................................................................................................................................................... 12
Tx700 Pro..................................................................................................................................................... 12
Modem Setup Option Board ........................................................................................................................... 12
Tx700Pro...................................................................................................................................................... 12
How to get best range ..................................................................................................................................... 13
LED indicator.................................................................................................................................................... 13
Range Check .................................................................................................................................................... 13
Known Limitations........................................................................................................................................... 14
Foreword Receivers......................................................................................................................................... 15
Physical and technical specifications............................................................................................................... 15
Rx700 Normal Range ................................................................................................................................... 15
Rx700 Long Range ....................................................................................................................................... 16
Binding............................................................................................................................................................. 17
Failsafe foreword............................................................................................................................................. 17
The 3 Failsafe in detail..................................................................................................................................... 17
Ch12/PPM options........................................................................................................................................... 18
RSSI output ...................................................................................................................................................... 19
Connectors Servo............................................................................................................................................. 19
Serial Debug Output ........................................................................................................................................ 19
Special Features Configurations ...................................................................................................................... 21
Channels on Normal Range ......................................................................................................................... 22

3
Antenna setup ................................................................................................................................................. 23
Bad antenna position .................................................................................................................................. 24
Firmware upgrading ........................................................................................................................................ 25
Option Board for RX LR 7.01............................................................................................................................ 28
LED indicators.................................................................................................................................................. 29
Abbreviations................................................................................................................................................... 30
FPV general trouble shooting guide ................................................................................................................ 33
Design hints: ................................................................................................................................................ 33
Radio Technical knowledge ............................................................................................................................. 35
Warning and Disclaimer ......................................................................................Error! Bookmark not defined.
Foreword TSLRS
In this manual you will find guides to setup your system, tips to get most out of your system and how to
trouble shoot you problems. If you want to get a quick answer to your question you can go and see our FAQ
list, which contains all kind of questions we have received both simple and more technically oriented.
Foreword Transmitter
Here you will find the information which is needed to make your transmitter perform at the very best both
for Tx700Pro and for the Tx700Lite. Notice if the Pro or the Lite is not listed under a subject, it means that
it’s the same for both.
Technical Specs
Tx700Pro
RF Output power: 500mW/1000mW/2000mW.
RF Output connector: BNC female.
The transmitter power is user selectable via easy to access 3 way switch.
(We recommend using “low” power mode, so power up is possible in case of an out of range situation will occur)
The transmitter can handle full power, continually no time limit.

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The antenna output is designed for 50 Ohm load; however the transmitter stage is specially protected and
can handle full power at both open and shorted antenna.
It is normal to perform range check with antenna removed and 500mW setting.
Tx700Lite
RF Output power: 500mW
RF Output connector: SMA female
RF Input: DIN 4
The Antenna output is designed for 50 Ohm load.
The PPM input signal can be either constant frame repeat time, or variable, Positive or Negative
polarisation. The special double speed Futaba PPM signal is also accepted, Auto detects and auto handle.
The main PPM signal must contain from 4-12 servo channels, if main PPM signal has under 4ch it will be
refused.
Note: Graupner call each way a servo travel for a channel, so in Graupner terms a 24 Channel setting
handle 12 servos, and is what we call a 12 channel signal.
Inputs/Output connectors
Tx700Pro
DIN 3 pin female screw type for POWER and MAIN-PPM input
The female DIN connector seen from outside the TX
Tx700Lite
Power input connecter
Power input connecter is centre positive

5
DIN 4 pin female screw type for POWER and MAIN-PPM input
Stereo Jack for Audio Demodulator Input, and Head-Tracker PPM input
The top of the connector is Head-Tracker PPM input (shorted HT)
The Ring of the connector is AUDIO input from the wireless video system receiver.
Ground is common for both signals.
Shielded cables are recommended to avoid cross talk.
Hardware specifications
Tx700Pro
Supply voltage 5-25V for 500mW power
Supply voltage 6-25V for 500mW-1000mW-2000mW power
Supply power usage is 3 times the transmit power.

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Supply current at 20V (500mW x 3 = 1.5W / 20V = 0.075 Ampere)
Supply current at 10V (500mW x 3 = 1.5W / 10V = 0.15 Ampere)
Supply current at 6V (2000mW x 3 = 6W / 6V = 1 Ampere)
Tx700Lite
Supply voltage 5-25V for 500mW power
Supply current at 20V (500mW x 3 = 1.5W / 20V = 0.075 Ampere)
Supply current at 10V (500mW x 3 = 1.5W / 10V = 0.15 Ampere)
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.
Examples: Watt / Supply Volt = 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 batteries
like LIPO do not like to be fully empty.
When using the power-up feature, input supply power will also go up. The unit has 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 TX unit consume almost 6W, this means 4W is radiated as heat.
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!
Peak operating heat sink temperature -40C to + 80C
Suggested Operating heat sink range -20C to + 60C
PPM input, both main PPM and HT PPM, level 1.5Vpp to 10Vpp.
AC or DC coupled, this means it is also JR and Graupner student signal compatible. However for serious
stable long range flight, it is recommended to use a 3-5V DC coupled PPM signal for best stable signal to
noise margin.

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Physical Dimensions
Tx700Pro
Height: 32mm
Width: 74mm
Length: 100mm
Weight: 280 gram
Tx700Lite
Height: 25mm
Width: 55mm
Length: 85mm
Weight 128 gram
Legal Information
The radio system is using frequency hopping, random sequence with very short time slots. The time pr
channel is only 15mS, which means it apply to the 10mW pr average channel regulation in EU and many
other areas. This means the 500mW peak setting can be used legally without any radio amateur licence.
Note* The Tx700Lite is CE approved and certified.
Adapter wiring
Futaba
JR/Graupner
Multiplex
Naked (only for Tx700Pro)

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Binding in details
The binding function stores the TX signal unique ID code and PPM frame rate and number of servos into the
receiver; this must be done every time the number of servos is changed on the RC unit. (or another RC with
PPM system)
The binding process is the same on Tx700Lite.
To bind:
1. Power off, Tx and Rx.
2. Hold down bind button on Tx.
3. Power up the Tx, (we assume right plane memory is recalled on your RC unit).
4. Power up receiver, make sure both antennas are connected and within 20 meter / 65 feet distance.
5. Wait 1-2 sec, see the RX LEDs go from lit into fast blink mode.
6. Power off Tx (Rx is still on).
7. Power on Tx (Rx is still on).
8. Test all servo functions on plane works and have ultra fast and smooth response.
9. With TX on, try to power OFF and ON the Rx and prove it lock to the Tx very fast after power on.
Instruction video on how to bind and store failsafe - http://www.youtube.com/channel/UCS2wXoorQHQaYmoSLE5_esg
If you use external battery for the LRS TX, then the binding procedure is a little bit different, leave the RC
unit on ALL the time and connected to the LRS TX, the power on/off to the TX as mentioned in the binding
procedure is only the LRS TX, now it will work, the binding mode is only activated when button is held down
while power to the LRS TX is applied.
Change unique ID code
Tx700Pro
Remove the top lit, inside the TX unit you find a DIP switch with 8 tiny white buttons, which can be slide up
or down.
Tx700Lite
Remove the top lid with the bind button and led. Now pull the board out slowly from the other end. Inside
the Tx unit you find a DIP switch with 8 tiny white buttons which can slide up or down.

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Note: The text ID code next to it. If you need to create a take-over mission, then the two TX units must have
the same ID code to be accepted by the RX. If you need to fly side by side with a friend, just be sure you use
different ID code. After ID code change, a new bind must be performed.
Output Power selection button
Tx700Pro
The 3 way transmit power switch is located near the antenna connector on the top, where it is most easy to
access while in flight. Move the connector close to the antenna connector for low power mode. It is
recommend to use as little as possible power, so power-up is possible in case an out of range situation is
experienced, this way it is possible to regain control and fly back home.
Failsafe
The same push button on the top is used both for binding, and to store Failsafe into the receiver.
When the button is pressed while the TX is powered on it’s in the binding process.
When the TX is in normal flight mode, the button is used to store failsafe.
The failsafe procedure is explained on page 18.
Compatibility TX-RX
All versions of TSLRS RX units can be binded and work together with any versions of TSLRS TX units.
Since the over air signals are kept the same from the very start. The TSLRS system parts is NOT TX-RX
compatible with any other brands of long range systems, we all use our own radio modulation system.
Compatible RC's
Any Radio Control remote system with PPM output should be able to used, check your manual for student
out, and if it is compatible with PC simulators and other types of RC systems, then you know you got a PPM
signal and not a special un-compatible digital signal. The PPM signal can be any polarity, and also variable
speed, and even the special Futaba double speed mode is supported. See our RC compatible chart to
secure that your RC works.