Keysight E4980A - Page 477

Keysight E4980A/AL User’s Guide -477
Handler Interface
Setting Up the Handler Interface Board
Step 7. If Table E-11 shows “Required” in the “Pull-up resistor mounting” column for
the setting you want to use, mount the pull-up resistor for the comparator
test result output signals. The pull-up resistor for DCV1 uses J1 and J2,
whose locations are indicated as J1 and J2 on the handler interface board.
The pull-up resistor must be a resistor array of which the characteristics
satisfy the following formula:
Equation E-1
where:
— Vp [V]: pull-up voltage
—R [k]: pull-up resistance
For the typical pull-up resistor values, refer to Table E-14 on page 478.
Step 8. Go through the flow chart in
Step 5 to determine the jumper and bit switch
settings for the control output signals:
Step 9. Set up the jumpers as instructed in Table E-12.
Step 10. If
Table E-12 shows “Required” in the “Pull-up resistor mounting” column for
the setting you want to use, mount the pull-up resistor for the control output
signals. The pull-up resistor for DCV2 uses J3, whose location is indicated as
J3 on the handler interface board.
The pull-up resistor must be a resistor array of which the characteristics
satisfy the following formula:
Equation E-2
R
Vp
3
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Table E-12 Jumper and bit switch settings for control output signals
Setting # JP2 Bit 6 of
S1
Circuit common Pull-up resistor
mounting
Pull-up voltage
Setting 1 1 On Instrument’s circuit
common
Required +5 V, internal
Setting 2 2 On Instrument’s circuit
common
Required +12 V, internal
Setting 3 3 Off COM2 Required +5 V through +24 V,
external
(EXT.DCV2)
Setting 4
-
1
1. Set to 3 when using input signals (it is not necessary to mount the pull-up resistor).
Off COM2 Not required -
R
Vp
3
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