HP 8414A Operating And Service Manual page 95

Table 8-5. Intensity Modulator DC Voltage Measurements
Voltage Measurement Point
Condition1 A1TP2 A1TP5 A1TP9 A1TP8 A1Q2B A1Q2E A1Q3E
A1Q6E A1TP1 and A1TP3
I
+110V2 -3.6V3 -3 -14 -13.5 -14 -6.5 -4.2 +65V +3V
(8410A only) ±1V ±1V ±1V + 1V ±0.5V ±0.5V none4
II +110V2
-3.6V3 -18 -4.8 -18 -15 -5.5 -4.2 +70 +3V
±2V
+0.5V
±2V
±1V
±0.5V
±0.1V +65 to +85V4
III +110V -3.4
-18
-0.7 -18 -15 -0.6 -3.5
+108 ±4V
±0.2V ±2V ±0.1V ±2V ±1V ±0.1V ±0.1V
+102 to +108V4
IV +110V
-3.5 -18 -13.5 -13 -13.5 -7 -4.2
+65 ±3V
±0.1V ±2V ±1V ±1V
i
±1V +1V ±0.1V none4
b. No RF signal to 8410A Network Analyzer (No unblanking signal) Does not apply for 8407A Network Analyzer.
II. Unblanking signal from Network Analyzer (Network Analyzer phase locked for 8410A).
III. Unblanking signal from Network Analyzer and -5V applied to J2 MARKER INPUT.
IV. Unblanking signal from Network Analyzer and -5V applied to J1 BLANKING INPUT.
^Adjust R20 Intensity Limit control for +110V at A1TP2.
^Adjust front-panel INTENSITY control for -3.6V at A1TP5 (INTENSITY control will vary voltage from about -2.5V to -4.8
Vdc).
^Amount voltage will vary with front-panel INTENSITY control.
Low Pass Filters and Horizontal and
SERVICE SHEET 2