AR 10013130, Руководство по эксплуатации и обслуживанию

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Model 2000TP2G8B
20 Rev -
3.6 INITIAL TURN ON AND WARM-UP PROCEDURE
Operation is described without the external filter/switch assembly attached. Operation with the external
filter/switch assembly attached is the same, except that the band selection must first be set to match the input
RF frequency range, and the load is connected to the filter / switch assembly RF output connector. Sub-band
selection changes can only be made when in the Standby mode, not the Operate mode. Remote commands to
band switch while in the Operate mode will not be processed to switch bands.
Band Frequency Range
Low 2.5 to 4.6 GHz
High 4.6 to 7.5 GHz
CAUTION:
Do not position the switch using manual controls on the switch.
Install the TWTA as discussed in section 3.2. Provide an RF generator to the RF input Type N connector. Set
RF generator level below -50dBm and set desired frequency in specified range. Connect a load suitable for
200 watts continuous operation to the RF output. The load VSWR should be less than 2.0:1 A power meter
and suitable attenuators may be connected to the RF reverse power sample port. The RF sample port
calibration factors on the rear of the unit or on the
Info screen in MENU 2 show the relation between the
amplifier output power and the RF sample port power as a function of frequency.
Connect a TTL level video pulse signal within the specification sheet parameters to the Pulse Gate input
(Video). For test purposes, the following parameters may be set:
•
Pulse Width: 10 Microseconds
•
Pulse Rate: 1 kHz
•
Baseline: 0V
•
Peak level: +4V
•
Video source impedance: 50 ohms or less.
This results in a Duty Cycle (also called duty factor) of 1%. This is within the specified range.
Set keylock to LOCAL.
Switch on the MAIN POWER circuit breaker. The fans will operate. The front panel display will show
several identification messages and then the MENU 1 screen. The third line will indicate that the heater time
delay is active.