![background image](http://html1.mh-extra.com/html/keithley/7999-4/7999-4_instruction-manual_4071817007.webp)
SBG 8/31/99
7999-4 Microwave SPDT RS-232 Switch
CONTACT CONFIGURATION:
Single Pole Double Throw.
CONNECTOR TYPE:
3-SMA type connectors (COMMON, NO, NC).
MAXIMUM SIGNAL:
120W 3GHz (VSWR 1.15 or less), CAT I.
CONTACT RESISTANCE:
0.1
Ω
max.
CONTACT LIFE: Mechanical:
5
×
10
6
(at 180cpm).
Electrical:
5
×
10
6
(3GHz, 50
Ω
, VSWR 1.2 at 20cpm).
MAXIMUM COMMON MODE:
42V peak, any terminal to earth.
ACTUATION TIME:
25ms.
RELAY CHARACTERISTICS (50
Ω
):
To
1–
4–
8–
12.4–
Frequency
1GHz
4GHz
8GHz
12.4GHz 18GHz
VSWR (max)
1.1
1.15
1.25
1.35
1.5
Insertion Loss
(dB max.)
0.2
0.2
0.3
0.4
0.5
Isolation
(dB min.)
85
80
70
65
60
GENERAL
INTERFACE:
RS-232 control (9600 baud, 8 data, 1 stop). Response
terminator selectable (CR, LF, CRLF, LFCR).
INDICATORS:
Power, relay position status.
ENVIRONMENT: Operating:
0° to 40°C, up to 35°C <80% RH.
Storage:
–25° to 65°C.
EMC:
Conforms with European Union Directive 89/336/EEC, FCC
part 15 class B.
SAFETY:
Conforms with European Union Directive 73/23/EEC.
DIMENSIONS:
109mm long
×
112mm wide
×
59mm deep (4.3˝
×
4.4˝
×
2.3˝).
ACCESSORIES SUPPLIED:
AC/DC power adapter with line cord,
user and service manual.
Summary of Contents for 7999-4
Page 1: ...Contains Operating and Servicing Information Model 7999 4 Microwave Switch Instruction Manual...
Page 12: ...1 GeneralInformation...
Page 16: ...2 Connections...
Page 22: ...3 Operation...
Page 25: ...3 4 Operation 1 1 Figure 3 2 Jumper location...
Page 29: ...4 ServiceInformation...
Page 34: ...5 ReplaceableParts...
Page 38: ......
Page 41: ...Keithley Instruments Inc 28775 Aurora Road Cleveland Ohio 44139 Printed in the U S A...