Agilent Technologies 5517B Operation And Service Manual page 94

position. The Digital Section is OK. If A3U2C (Pin 8) doesn't go high, check divider and state machine circuitry. See
A3 Power Amp section for additional information.
s. Signature Analysis:
When taking signatures, ensure that heater test jumper is in the off position.
Damage to the high voltage power supply or laser tube assembly could result if
these instructions are not adhered to.
With the power (±15 Vdc)
follows:
Connect the Signature Analyzer (HP 5005A/B) test pod leads as follows:
Connect signature analyzer front panel controls as follows:
CAUTION
disconnected,
• HTR OK = HI
• -REF ON = HI
• RESET = TEST
• CLOCK FREQUENCY = Remove
• HEATER = OFF
• A3TP2, A3TP3 and Pin "X" of HTR OK = jumpered to Ground
• GND = A3TP4 (labeled "GRD")
• CLOCK = A3TP5 (labeled "CLK")
• STOP = A3TP6 (labeled "STP")
• START = A3TP7
• CLOCK, START, and STOP Polarity set for falling edge.
set the HP5517B/C/D switches and test jumpers as