2.2.4 RPM Readout Channels 
a. Open control and readout unit drawer of the console. 
b. Set rpm meter ON-OFF switches on rear of chassis according to channel(s) to 
be used, if not previously set. 
c. Put the RPM TEST-OPERATE switch, located near the rear center of the 
chassis, in the TEST position. The panel meter(s) should indicate 720 rpm for either the 
1500- or 83000-rpm scales. NOTE: The readout circuit telemetering link must be in operation 
for this check. 
d. If meter calibration is incorrect, adjust appropriate trimmer capacitor on right 
side of control and readout unit chassis. 
e. Place switch in OPERATE position and close drawer. 
f. Slowly apply propulsion power and check rpm readout meter (s). 
2.2.5 Spare Data Channel 
When the spare Channel discriminator is used, the controls on the front of the 
discriminator should be adjusted as required for zero and full scale. 
2.3 MODEL TESTING 
Operating procedure during the model tests will depend upon the type of tests to be con- 
ducted so no specific procedure will be outlined. The rudder controls may be changed from one 
mode of operation to another at any time. The propulsion levers. should not be moved rapidly 
except in an emergency. The field temperature of the motor-generators should be checked 
frequently when using high propulsion power. 
2.4 EMERGENCY STOPS AND MODEL SHUT-DOWN 
All model equipment may be turned off at any time by operation of the POWER AND FAIL- 
SAFE switch. If there is a loss of communication to the model, all power will be shut off 
automatically. The positive lead of the motor-generators and motor-alternators should be 
disconnected when the equipment is not being used. 
III-8 
