16. Second IF Amplifier and Third Converter Adjustment

17.Pilot Second IF Amplif’ier Adjustments

Reference

RF Section:

A9 Pilot Second IF AmplifierA10 Pilot Third Converter

Description A synthesized sweeper is used to inject a signal of 269 MHz at -20 dBm into the A9 Pilot Second IF Amplifier. The output of the amplifier is displayed on a scaler network analyzer. The amplifier is adjusted for a bandpass of greater than 21 MHz centered at 269 MHz and a gain of greater than + 10 dB.

SYNTHESIZED !WEEPER

POAFR METER

NETWRK ANALYZER

Figure 3-67. Pilot Second IF Amplifier Adjustments Setup

Equipment Synthesized Sweeper . . . . . . . . . . . . . . . . . . . . . . . . HP 8340A/B Scalar Network analyzer . . . . . . . . . . . . . . . . . . . . . . . HP 8757A

Power Splitter . . . . . . . . . . . . . . . . . . . . . . HP 11667A Opt. 001

Power Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..HP436 A

Power Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..HP8482 A Detector (2 required) . . . . . . . . . . . . . . . . . . . . . . . . . HP 11664A 20 dB Attenuator . . . . . . . . . . . . . . . . . . . . HP 8491A, Opt. 020

Adapters:

Type N (f) to APC-3.5 (f) . . . . . . . . . . . . . . . . . . . . . .

Type N (m) to BNC (f) (2 required) . . . . . . . . . . . . .Type N (f) to BNC (f) (2 required) . . . . . . . . . . . . . .

APC 3.5 (f) to APC 3.5 (f) . . . . . . . . . . . . . . . . . . . . .

1250-1745

1250-0780

1250-1474

1250-1749

Cables:

BNC to SMB Snap-On (Service Accessory) (2 required) . 85680-60093

BNC 122 cm (48 in) (3 required) . . . . . . . . . . . . . . . . . . 10503A SMA (m) to (m) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5061-5458

3-116 Adjustments