User`s guide

13
Table 4. Matrix selection table—specifications and characteristics
34931A 34932A 34933A 34934A
Channels/configurations dual 4x8 dual 4x16 dual 4x8 quad 4x32
8x8 8x16 8x8 4x128
4x16 4x32 4x16 8x64
quad 4x8, 1-wire 16x32
Switchtype Armature Armature Reed Reed
latching latching non-latching non-latching
Input characteristics (per channel)
Max volts ± 300 V
[1]
± 300 V
[1]
± 150 V peak
[2]
± 100 V peak
Maxcurrent(DC,ACRMS)
Switch current 1 A 1 A 0.5 A
[5]
/0.05 A
[8]
0.5 A
Carry current 2 A 2 A 1.5 A
[5]
/0.05 A
[8]
0.5 A
Power (W, VA)
[2, 6]
60 W 60 W 10 W
[7]
10 W
Volt-Hertz limit 10
8
10
8
10
8
10
8
Initial closed channel res
[3][9]
<1.5Ω <1.5Ω < 1.5 Ω
[5]
/200 Ω
[8]
<1Ω/100Ω
nominal
General Specifications
Offset voltage
[3]
< 3 uV < 3 uV < 50 uV < 20 uV
< 100 uV 1-wire < 50 uV 1-wire
DCIsolation(ch-ch,ch-earth) >10GΩ >10GΩ >10GΩ 10GΩ
AC characteristics
Bandwidthatterminalblock
[4]
30 MHz 30 MHz 30 MHz
[5]
/4 MHz
[8]
35 MHz 2-wire
2 MHz 1-wire 15 MHz 1-wire
Crosstalk at terminal block (ch-ch)
[4]
300kHz -65dB -65dB -65dB -65dB
1MHz -55dB -55dB -55dB -55dB
20MHz -30dB -30dB -40dB -33dB
Capacitance at terminal block
HI-LO 50pF 50pF 80pF 45pF
LO–earth 80pF 80pF 75pF 250pF
General characteristics
Relaylife,typical
Noload 100M 100M 1000M
10 V, 100 mA 10 M 10 M 10 M 1000 M operations
Ratedload 100k 100k 10k
Open/close time 4 ms/4 ms 4 ms/4 ms 0.5 ms/0.5 ms 0.35 ms/0.10 ms
Analogbusbackplaneconnection Bank2 Bank2 Bank2 No
[1] DCorACRMSvoltage,channel-to-channelorchannel-to-earth
[2] Peak voltage, channel-to-channel or channel-to-earth
[3] Into analog bus. System errors are included in the internal DMM
measurement accuracy specifications
[4] 50Ωsource,50Ωload,differentialmeasurementsverified(Sdd21)
[5] Withinputresistorsbypassed.Bypassingresistorswillreduce
lifetime of relays. See the rated load relay life characteristics.
[6] Limitedto6Wchannelresistancepowerlosspermodule
[7] Powerrestrictionsallowonly20channelstobeclosedatonetime
[8] ProtectionResistors:
 34933A-100Ω±5%;0.5W;TC=±200ppm/°C.
 34934A-100Ω±1%;0.25W;TC=±100ppm/°C.
If this resistance is not bypassed in the low side source line of a 4-wire resistance measurement, the 100 Ω range is limited.
[9] Channelresistanceistypically<1.5Ωbutcangoashighas50Ωwhenachannelisusedinmeasurementapplicationswith
< 10 mA load current. Increased relay channel resistance for measurements with load currents below 10 mA can occur on
cards that have been out of service or following relay inactivity for periods of greater than 1 week. Switching relays for
2K cycles prior to use may reduce the variation in channel resistance. Applies to the 34931A and 34932A. Agilent recom-
mends the use of 4-wire Ohms for resistance measurements. For high accuracy voltage measurements, select the DMM
inputresistancesettingof>10Gohmstominimizetheimpactofrelaycontactresistance.