Spektrum SPMAR635 - Manual (Page 19)

EN
19
AR635 Power System Requirements
All receivers require uninterrupted power. AS3X demands more current from
the servos due to the “non-stop” activity. During even a short duration power
interruption/brownout, the AS3X sensor must reboot and re-initialize.
CAUTION: If a power interruption/brownout occurs during flight, a
crash will occur. It is your responsibility to ensure the AR635 has
sufficient power without interruption.
Some of the power system components that affect the ability to properly deliver
adequate power include:
• Only use this receiver with AS3X-compatible ESCs.
• The ESC’s BEC capability to deliver current to the receiver when load is
placed on the servos. This is the #1 cause of power interruptions in electric
powered aircraft. Use only AS3X-friendly ESCs.
• The switch harness, battery leads, servo leads, regulators, etc.
• Receiver battery pack (number of cells, capacity, cell type, state of charge).
The AR635 has a minimum operational voltage of 3.5 volts; it is highly
recommended the power system be tested per the following guidelines.
Recommended Power System Test Guidelines
Perform the following test with a voltmeter or servo current meter (HAN172).
Plug the Servo Current Meter (HAN172) into the Bind port in the receiver and,
with the system on, rapidly move the control sticks (stir the sticks) with no load
on the servos for 3 minutes. Monitor the voltage at the receiver. It is important
to rapidly move the control sticks for 3 minutes. If a voltage regulator becomes
hot, it can lose its ability to supply current. An alternate method is to power on
the system and load the servos by applying pressure to the control surfaces
with your hand for 3 minutes. The voltage should remain above 4.8 volts in
both cases.