HP 3488A Switch/Control Unit

The HP 3488A switch/control unit brings versatile, HP-IB programmable switching to tests requiring multi-channel measurements. The HP 3488A provides signal switching with the integrity and isolation needed for high-performance production test systems. It also offers a flexible, low-cost interconnection for automating experiments on the bench and for developing tests in the lab. The HP 3488A is designed to hold up to five of the following switch and control modules:

10-channel relay multiplexer (opt 010)
10-channel general purpose relay (opt 011)
Dual 4-channel VHF switch (opt 012)
4 x 4 matrix switch (opt 013)
16-bit digital input/output (opt 014)
Breadboard (opt 015)
3-channel 18 GHz switch (opt 016)
7-channel form-C relay (opt 017)
2-channel microwave switch (opt 018)
1.3 GHz 50 and 75 ohm multiplexer (opt 019, opt 020)

[ Features ]

DC to 26.5 GHz signal switching
Up to 50 channels
Matrix, multiplexer, and general purpose relays
40 configuration storage registers
Digital I/O control and actuation
11 switch and control modules

[ Specifications ]

Multiplexer (Option 010/HP 44470A)
Option 010 is a 10-channel multiplexer for scanning or multiple 
signal connections. Channels switch 2 wires (Hi and Lo) with 2PST 
relays for DVM inputs and other signals up to 250V and 2A. This 
module can also be used to multiplex signals to other switching 
functions, such as the matrix module.

Input Characteristics
Maximum Voltage (terminal-terminal or terminal-chassis):
250 V dc, 250 Vac rms, 350 Vac peak
Maximum Current: 2A dc, 2 A ac rms
Maximum Power: 60 W dc, 500 VA ac
Thermal Offset: < 3,µV
DC Isolation (40ºC, 60% RH)
  Channel-channel, open channel: >10^11 ohm


AC Isolation/Performance
	(50 ohm termination)	100 kHz	1 MHz	10 MHz
	Insertion Loss (dB)	<0.30	<0.35	<0.90
	Crosstalk (dB)		<-73	<-53	<-33




General Purpose Relay (Option 01l/HP 44471A)
This module consists of 10 SPST independent relays for general 
signal switching and control of external devices. Quality connections
make this module ideal for switching signals when multiplexing is 
not required, or for supplying switchable power to the device under 
test.

Input Characteristics
Maximum Voltage (terminal-terminal or terminal-chassis):
250 V dc, 250 Vac rms, 350 Vac peak
Maximum Current: 2A dc, 2 A ac rms
Maximum Power: 60 W dc, 500 VA ac
Thermal Offset: < 3,µV
DC Isolation (40ºC, 60% RH)
  Channel-channel, open channel: >10^11 ohm


AC Isolation/Performance
	(50 ohm termination)	100 kHz	1 MHz	10 MHz
	Insertion Loss (dB)	<0.30	<0.35	<0.90
	Crosstalk (dB)		<-73	<-53	<-33




VHF Switch (Option 012/HP 44472A)
The VHF module provides broadband switching for high-frequency and 
pulse signals. The two independent groups of bidirectional 1 x4 
switches can be used for signals from dc to 300 MHz. All channels 
have  50-ohm characteristic impedance and are break-before-make within 
a group of four channels. Each group is isolated from the other and 
from ground to prevent ground loops. Excellent isolation makes this 
module ideal for high-frequency signal analyzer measurements requiring 
a large dynamic range.

Input Characteristics
Maximum Voltage
  Center-center, center-low: 250 Vdc, 30 Vac rms, 42 Vac peak 
  Low-chassis, low-low: 42 V dc
Maximum Current (per channel): 30 mA dc, 300 mA ac rms 
Thermal Offset:  <15 µ V per channel
Characteristic Impedance: 50 ohm

AC Isolation/Performance
			30 MHz	100 MHz	300 MHz
Crosstalk (dB)
Channel-Channel		<-100	<-85	<-65

Group-Group		<-85	<-85	<-50
Insertion Loss (dB)	<0.5	<0.75	<1.25 
VSWR			<1.06	<1.12	<1.43

All channels break-before-make within a group of 4 channels.




Matrix Switch (Option 013/HP 44473A)
Option 013 offers highly flexible switching with a 4x4, 2-wire
matrix. Any combination of four input channels maybe connected to any
combination of 4 output channels. Each cross point or node in the 
matrix uses a 2PST relay to switch two lines (Hi and Lo) at a time. 
Multiple 4 x 4 modules can be connected to form larger matrices. 
Multiplexer can be used in conjunction with this module to effectively 
expand the number of inputs and outputs of the matrix.

Input Characteristics
Maximum Voltage (terminal-terminal or terminal-chassis):
250 V dc, 250 Vac rms, 350 Vac peak
Maximum Current: 2A dc, 2 A ac rms
Maximum Power: 60 W dc, 500 VA ac
Thermal Offset: < 3,µV
DC Isolation (40ºC, 60% RH)
  Channel-channel, open channel: >10^11 ohm


AC Isolation/Performance
	(50 ohm termination)	100 kHz	1 MHz	10 MHz
	Insertion Loss (dB)	<0.30	<0.35	<0.90
	Crosstalk (dB)		<-73	<-53	<-33




Digital I/O (Option 014/HP 44474A)
This module offers 16 very flexible bidirectional I/O lines and 
4TTL-compatible handshake lines for sensing and control of external 
devices. The digital inputs can be used to sense contact closures to 
ground. Each channel provides current sinks for remote switching of 
external relays, such as the HP 33311 series coaxial switches.

I/O Lines
Maximum Voltage: +30 Vdc (line-chassis)
Output Characteristics: V (high) >=2.4 V; V (low) <=0.4 V
I (low) Maximum: 125 mA @ V (low) <=1.25 V; fused at 250 mA 
Input Characteristics: V (high) >=2 V; V (low) <=0.8 V 
External Increment: Advances HP 3488A to next programmed 
configuration on falling edge of TTL pulse
Channel Closed: Indicates completion of new configuration; TTL
pulse




Microwave Switch (Option 016/Hp 44476A)
This microwave switch furnishes three independent SPST 50-ohm coaxial 
switches with excellent performance from dc to 18 GHz. The 3.5 mm SMA 
connector allows you to easily connect cables for multiple system 
configurations.

Frequency Range: DC to 18 GHz
Isolation: >90 dB
Impedance: 50 ohm
Insertion Loss: < 0.05 dB
SWR: 1.40




Form-C Relay (Option 017/HP 44477A)
This module provides seven separate SPDT channels for general purpose 
switching and control of external devices. Using a power supply, the 
module can drive programmable attenuators and non-HP coaxial switches.

Input Characteristics
Maximum Voltage (terminal-terminal or terminal-chassis):
250 V dc, 250 Vac rms, 350 Vac peak
Maximum Current: 2A dc, 2 A ac rms
Maximum Power: 60 W dc, 500 VA ac
Thermal Offset: < 3,µV
DC Isolation (40ºC, 60% RH)
  Channel-channel, open channel: >10^11 ohm


AC Isolation/Performance
	(50 ohm termination)	100 kHz	1 MHz	10 MHz
	Insertion Loss (dB)	<0.30	<0.35	<0.90
	Crosstalk (dB)		<-73	<-53	<-33




Microwave Switch (Option 018/HP 44476B)
The module brings multi-port 50 ohm coaxial switching to your test 
system. The module can mount any two  HP  3331XX coaxial switches. 
The HP coaxial relays come in 3-, 4-, and 5-port configurations--
different switches for a variety of applications. HP coaxial switches
that can be used are:

	HP Coaxial Switch	Port	Frequency
	HP 33311B/Opt 011	3	dc to 18 GHz
	HP 33311C/Opt 011	3	dc to 26.5 GHz 
	HP 33312B/Opt 011	4	dc to 18 Ghz
	HP 33312 C/Opt 011	4	dc to 26.5 Ghz
	HP 33313B/Opt 011	5	dc to 18 GHz
	HP 33313C/Opt 011	5	dc to 26.5 GHz

Microwave Switch Module
	Refer to HP 3331XX product specifications.





1.3 GHz 50 Ohm Multiplexer (Option 019/HP 44478A)

1.3 GHz 75 Ohm Multiplexer (Option 020/HP 44478B)
These modules bring bi-directional switching of signals from dc to 
1.3 GHz, with high-channel isolation (> 55 dB @ 1 GHz). Each module 
consists of two groups of 1x4 multiplexer. All test connections are 
made to BNCs on the module’s edge. Off-channels can be resistively 
terminated.

Input Characteristics
Maximum Voltage: 42 Vdc + ac peak
Maximum Current per Channel: 1 A DC or AC rms
Maximum Power per Channel: 24 W, 24 VA, or 44 dBm 
Impedance: 50 ohm (Opt 019/HP 44478A) 75 ohm (Opt 020/HP 44478B)


AC Performance

	<= 10 MHz	<= 100 MHz	<= 500 MHz	<= 1.3 GHz

Insertion Loss (dB)
<= (40º C,  95% RH)		<0.3	<0.7	<1.5	<30
<= (25º C, 40% RH), (Typ.)	<0.2	<0.5	<1.1	<1.9 
Crosstalk (dB)
Channel-Channel
Channel-Common			<-90	<-80	<-65	<-55
Group-Group, Module-Module	<-90	<-80	<-70	<-60 
VSWR				<1.2	<1.25	<1.35	<1.55




Breadboard (Option 015/HP 44475A)
The breadboard module provides a convenient way to implement custom 
circuits and special functions that interface directly to the 
HP 3488A’s backplane control signals.

[ Ordering ]

HP 3488A Switch/Control Unit Opt 010 10-Channel Relay Multiplexer Module Opt 011 10-Channel General Purpose Relay Module Opt 012 Dual 4-Channel VHF Switch Module Opt 013 4 x 4 Matrix Switch Module Opt 014 16-Bit Digital Input/Output Module Opt 015 Breadboard Module Opt 016 Microwave Switch Module Opt 017 Form-C Relay Module Opt 018 Microwave Switch Module Opt 019 1.3 GHz 50 Ohm Multiplexer Opt 020 1.3 GHz 75 Ohm Multiplexer Opt 0B3 Service manual Opt 401 Side Handle Kit Opt 907 Front Handle Kit Opt 908 Rack Mount Kit Opt 909 Front Handle Rack Mount Kit Opt ABD Germany - German localization Opt ABJ Japan - Japanese localization Opt W30 3 Year Return Repair Service Opt W50 5 Year Return Repair Service

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[ Related ]

Related product families available online:

Signal Routing and Measurement