530B User Manual Publication No. 980974 Rev. B
Calibration Procedure 4-4 Astronics Test Systems
Figure 4-2, Front Panel Meter Circuit Board Adjustment
Log of Adjustments
1. Connect the DC voltmeter to the NB OUTPUT jack, pin 10 of P1.
2. Set internal switches S3 and S4 to LOG position, and S2 to WB.
3. Set the RANGE switch to 10V, and the generator for 10.00 ±.05 VRMS.
4. Set R3 (NB LOG ADJ) for a 10.00 ±0.1 V indication on the DC voltmeter.
5. Connect the DC voltmeter the WB OUTPUT jack, Pin 14 of P1.
6. Set R4 (WB LOG ADJ) for a 10.00 ±0.10 V indication on the DC voltmeter.
Note: High pass, low pass filter part number 1697-1 is not a Butterworth
filter. The spread between the –5% and –3dB points is not calculated in the
usual way. Test to the following 3dB points ±10%.
HP
LP
3.4 Hz
3.5 KHz
19.8 Hz
7 KHz
43 Hz
14.1 KHz