HP HP 81536A User manual

User's Guide
HP 81536A Sensor Module
SERIAL NUMBERS
This manual applies to all instruments.
ABCDE
HP Part No. 81536-90011
Printed in Germany
Second Edition
E0796

Control Serial Number: Edition 2 applies directly to all instruments.
Edition 1 : 1st May 1990 : 81536-90011 : E0590
1st December 1990 : 81536-90011 : E1290
Edition 2 : 1st April 1992 : 81536-90011 : E0492
1st March 1993 : 81536-90011 : E0393
1st December 1994 : 81536-90011 : E1294
1st July 1996 : 81536-90011 : E0796

Safety Considerations
Before operation, you should review the instrument and manual, including the
red safety page, for safety markings and instructions.You must follow these to
ensure safe operation and to maintain the instrument in safe condition.
Initial Inspection
Warning
To avoid hazardous electrical shock, do not perform
electrical tests when there are signs of shipping damage to
any portion of the outer enclosure (covers, panels, etc.).
Power Requirements
The HP 81536A will operate when installed into the HP 8153A Optical
Multimeter mainframe.
Input/Output Signals
Caution
A maximum of 15V can be applied as an external voltage to any
BNC connectors.
iii

Contents
C. HP 81536A Specications
Supplementary Performance Characteristics . . . . . . . . . . . C-3
Analog output: .... .. .. .. .. .. .. .. .. .. . C-3
D. HP 81536A Performance Tests
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . D-1
Equipment Required . . . . . . . . . . . . . . . . . . . . . D-1
Test Record .......................... D-2
Test Failure .......................... D-3
Instrument Specication .... .. .. .. .. .. .. .. .. D-3
Performance Test .... .. .. .. .. .. .. .. .. .. . D-3
Accuracy and Linearity Test .... .. .. .. .. .. .. . D-4
Test Setup . . . . . . . . . . . . . . . . . . . . . . . . . D-4
I. Accuracy Test ...................... D-5
II. Linearity Test...................... D-5
III. Noise Test .. .. .. .. .. .. .. .. .. . .. .. . D-7
E. Cleaning Procedures
The Cleaning Kit . . . . . . . . . . . . . . . . . . . . . . . . E-1
Other Cleaning Tools . . . . . . . . . . . . . . . . . . . . . E-3
Preserving Connectors . . . . . . . . . . . . . . . . . . . . . E-4
Cleaning Instrument Housings ................. E-4
Correct Cleaning Procedure .... .. .. .. .. .. .. .. E-5
Cleaning Cable Connectors . . . . . . . . . . . . . . . . . . E-5
Cleaning Connector Adapters . . . . . . . . . . . . . . . . . E-6
Cleaning Connector Interfaces ................ E-6
How to clean instruments with a recessed lens interface . . . . E-7
Light dirt .. .. .. .. .. .. .. .. .. .. . .. .. E-7
Heavy dirt ........................ E-7
Index
Contents-1

Figures
D-1. Accuracy and Linearity Test Setup .............. D-4
D-2. Addition of results (example) . . . . . . . . . . . . . . . . . D-7
Contents-2

C
C
HP 81536A Specications
Specications describe the instrument's warranted performance. Supplementary
performance characteristics describe the instrument's non-warranted typical
performance.
Because of the modular nature of the instrument, these performance
specications apply only to this module.You should insert these pages into the
appropriate section of the manual.
HP 81536A Specications C-1

C
HP 81536A Specications
Sensor Element InGaAs
Wavelength range 800-1700nm
Power range +3 to -70dBm
Display resolution
dBm, dB 0.001
0.0001 on printout
Watt 0.01 to 10
(depending on power range)
Applicable ber type 9/125  m - 100/140  m, NA  0.3
Uncertainty (Accuracy) 6 2.5% (1000-1650nm)
[1]
Total Uncertainty 6 5% 6 50pW (1000-1650nm)
[2]
Linearity
18

Cto28

C const. temp 6 0.015dB 6 30pW
0

Cto55

C const. temp 6 0.05dB 6 50pW
Noise < 50pW (1200-1600nm)
peak-peak, avg. time 1sec
Dimensions 75mm H, 32mm W, 335mm D (2.8 " 2 1.3 " 2 13.2 " )
Weight net 0.6kg (1.3lbs), shipping 1kg (2.2lbs)
Recalibration period 2 years
Warmup time 20 min.
The display may vary by 6 1 count.
Information on the traceability of power meters is available on request
[1] at the following reference conditions:
Power level 10  W (-20dBm), Continuous Wave (CW).
Fiber 50  m graded index, NA=0.2, fully excited.
C-2 HP 81536A Specications

C
Ambient temperature 23

C 6 5K.
Connector Diamond HMS-10/HP.
At day of calibration (add 0.3% for aging over one year, add 0.6% over
two years).
Spectral width of source < 10nm.
[2] at the following operating conditions:
Fiber  50  m, NA  0.2.
For NA > 0.2 add 1%.
Ambient temperature 0 to 55

C, non-condensing.
Within 1 year after calibration, add 0.3% for second year.
For Biconic Connector add 6 1%.
Supplementary Performance Characteristics
Add 1% to total uncertainty for the full wavelength range.
Outside the specied wavelength range, the noise increases by up to 5 times
the value shown above.
Analog output:
Bandwidth:  DC,  300 to 400Hz, depending on range and sensor module.
Output voltage: 0 to 2V into open.
Output impedance: 600 typical.
Max. input voltage: 6 10V.
HP 81536A Specications C-3