Specifications

10
Digital Input/Ouput
Use the digital outputs with an exter-
nal power supply to control microwave
switches and attenuators, solenoids,
power relays, indicators, and more.
Use the digital inputs to sense limit
switch and digital bus status. There
are no complex handshake modes;
reads and writes are initiated either
from the front panel or the bus.
Digital Input/Output
Port 1, 2 8 bit, input or output, non-
isolated
Vin(L) < 0.8V (TTL)
Vin(H) > 2.0V (TTL)
Vout(L) < 0.8V @ Iout = - 400 mA
Vout(H) > 2.4V @ Iout = 1 mA
Vout(H) max < 42V with external open
drain pull-up
Alarming Maskable pattern match
or state change
Speed 4 ms (max) alarm
sampling
Latency 5 ms (typical) to 34970A
alarm output
Read/Write Speed 95/s
Agilent 34907A
Multifunction Module
• 16 bits of digital input and output
• 100 kHz totalizer input
• Two ±12V analog outputs
The 34907A allows great flexibility
for a variety of sense and control
applications. It combines two 8-bit
ports of digital input and output, a
100 kHz gated totalizer, and two ±12V
analog outputs—all on a single earth-
referenced module. The digital inputs
and totalizer input may be included
in a scan. Alarm limits for the digital
and event counter inputs are evaluat-
ed continuously, capturing and log-
ging alarm conditions even between
scans.
Analog Output
Use the two electronically calibrated
analog outputs to source bias voltages
to your device under test, to control
your analog programmable power
supplies, or use the outputs as set-
points for your control systems. The
outputs are programmed directly in
volts, either from the front panel or
from the bus.
Analog Output
DAC 1, 2 ± 12V, non-isolated
Resolution 1 mV
I
OUT
10 mA max
Settling time 1 ms to 0.01% of
output
Accuracy ±(% of output + mV)
1 year ±5°C 0.25% + 20 mV
Temp. Coefficient ± (0.015% + 1 mV)/°C
Port 1
Channel 01
Port 2
Channel 02
Bit 0
Bit 7
8
Bit 0
Bit 7
16
8
Channel 03
Channel 04
28 Bits
+IN
-IN
Gate
Gate
DIO
TOT
DAC 1
16
Channel 05
DAC 2
Totalize Input
Count events from devices like photo
interrupters, limit switches, and
Hall-effect sensors.
It keeps an updated total which can
be read via the front panel or pro-
grammatically at any time. With 26
bits of resolution, it can count events
at full speed for nearly 11 minutes
without an overflow.
Totalize Input
Max Count 2
26
- 1
Totalize Input 100 kHz (max)
Rising or falling edge,
programmable
Signal level 1 Vp-p (min)
42 Vpk (max)
Threshold 0V or TTL,
jumper selectable
Gate Input TTL-Hi, TTL-Lo, or none
Count Reset Manual or Read + Reset
Read Speed 85/s9