TB 9-6625-2296-24
(19) Press Norm (F1) (Normalize) key, allow normalize cycle to complete, and
reconnect cable 23 on A4 module (fig. 2) to its original position.
(20) Set signal generator for a 121.5 MHz, -40 dB output and verify signal peak is
within 1 dB of -40 dBm; readjust A4R5 (fig. 2) as necessary.
(21) Press Scan (F3) (Scan Width) and DATA SCROLL arrow keys to select 50 kHz
scan width.
(22) Adjust A4R5 (fig. 2) to position signal on -40 dBm line (1st major division from
the top).
(23) Press DATA SCROLL arrow key to select 1 kHz scan width and press DATA
ENTRY ENTER key.
(24) Adjust A4R96 (fig. 2) for a -40 dBm display on TI.
Figure 5. A25 Digitizer Module.
(25) Press DATA SCROLL arrow key to select 10 kHz scan width and press DATA
ENTRY ENTER key.
(26) Adjust A4R57 (fig. 2) for a -40 dBm display on TI.
(27) Press DATA SCROLL arrow key to select 1 MHz scan width and press DATA
ENTRY ENTER key.
(28) Adjust A4R24 (fig. 2) for a -40 dBm display on TI.
(29) Press Freq (F1) (Frequency Display) key and DATA ENTRY . 2 5 M keys (0.25 MHz).
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