Anritsu MP1763B User manual

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Fourteenth Edition
Document No.: M-W1023AE-14.0
Read this manual before using the equipment.
Keep this manual with the equipment.
Digital. com Division
Measurement Solutions
ANRITSU CORPORATION
MP1763B
Pulse Pattern Generator
Operation Manual

ii
To prevent the risk of personal injury or loss related to equipment malfunction, Anritsu Corporation uses the following
safety symbols to indicate safety-related information. Insure that you clearly understand the meanings of the symbols
BEFORE using the equipment.
Some or all of the following symbols may not be used on all Anritsu equipment. In addition, there may be other labels
attached to products which are not shown in the diagrams in this manual.
Safety Symbols Used in Manual
DANGER
WARNING
CAUTION
Safety Symbols Used on Equipment and/or in Manual
The following safety symbols are used inside or on the equipment near operation locations, and/or in manual to
provide information about safety items and operation precautions. Insure that you clearly understand the
meanings of the symbols and take the necessary precautions BEFORE using the equipment.
This indicates a prohibited operation. The prohibited operation is indicated
symbolically in or near the barred circle.
This indicates an obligatory safety precaution. The obligatory operation is indi-
cated symbolically in or near the circle.
This indicates warning or caution. The contents are indicated symbolically in or
near the triangle.
This indicates a note. The contents are described in the box.
These indicate that the marked part should be recycled.
Safety Symbols
MP1763B
Pulse Pattern Generator
Operation Manual
30August 1995 (First Edition)
12October 2000 (Fourteenth Edition)
Copyright © 1995-2000, ANRITSU CORPORATION.
All rights reserved. No part of this manual may be reproduced without the prior written permission of the
publisher.
The contents of this manual may be changed without prior notice.
This indicates a very dangerous procedure that could result in serious injury or
death if not performed properly.
This indicates a hazardous procedure that could result in serious injury or death if
not performed properly.
This indicates a hazardous procedure or danger that could result in light-to-severe
injury, or loss related to equipment malfunction, if proper precautions are not taken.

iii
WARNING
1. ALWAYS refer to the operation manual when working near lo-
cations at which the alert mark shown on the left is attached. If
the operation, etc., is performed without heeding the advice in
the operation manual, there is a risk of personal injury. In addi-
tion, the equipment performance may be reduced.
Moreover, this alert mark is sometimes used with other marks
and descriptions indicating other dangers.
2. When supplying power to this equipment, connect the acces-
sory 3-pin power cord to a 3-pin grounded power outlet. If a
grounded 3-pin outlet is not available, before supplying power
to the equipment, use a conversion adapter and ground the
green wire, or connect the frame ground on the rear panel of the
equipment to ground. If power is supplied without grounding
the equipment, there is a risk of receiving a severe or fatal elec-
tric shock.
3. This equipment cannot be repaired by the user. DO NOT at-
tempt to open the cabinet or to disassemble internal parts.
Only Anritsu-trained service personnel or staff from your sales
representative with a knowledge of electrical fire and shock
hazards should service this equipment. There are high-voltage
parts in this equipment presenting a risk of severe injury or fa-
tal electric shock to untrained personnel. In addition, there is a
risk of damage to precision parts.
4. This equipment should be used in the correct position. If the
cabinet is turned on its side, etc., it will be unstable and may be
damaged if it falls over as a result of receiving a slight mechani-
cal shock.



For Safety

iv
CAUTION
1. Before changing the fuses, ALWAYS remove the power cord
from the poweroutlet and replace the blown fuses. ALWAYS
use new fuses of the type and rating specified on the fuse mark-
ing on the rear panel of the cabinet.
T___A indicates a time-lag fuse.
___A or F___ A indicate a normal fusing type fuse.
There is risk of receiving a fatal electric shock if the fuses are
replaced with the power cord connected.
2. Keep the power supply and cooling fan free of dust.
• Clean the power inlet regularly. If dust accumulates around
the power pins, there is a risk of fire.
• Keep the cooling fan clean so that the ventilation holes are
not obstructed. If the ventilation is obstructed, the cabinet
may overheat and catch fire.
3. Use two or more people to lift and move this equipment, or use
a trolley. There is a risk of back injury, if this equipment is lifted
by one person.



HEAVY WEIGHT/重量物
CAUTION/注意
>18 kg
For Safety

v
Equipment Certificate
Anritsu Corporation certifies that this equipment was tested before
shipment using calibrated measuring instruments with direct
traceability to public testing organizations recognized by national
research laboratories including the Electrotechnical Laboratory,
the National Research Laboratory of Metrology and the
Communications Research Laboratory, and was found to meet
the published specifications.
Anritsu Warranty
Anritsu Corporation will repair this equipment free-of-charge
if a malfunction occurs within 1 year after shipment due to a
manufacturing fault, provided that this warranty is rendered
void under any or all of the following conditions.
• The fault is outside the scope of the warranty conditions
described in the operation manual.
• Thefaultisduetomisoperation,misuse,orunauthorized
modification or repair of the equipment by the customer.
• The fault is due to severe usage clearly exceeding
normal usage.
• The fault is due to improper or insufficient maintenance
by the customer.
• The fault is due to natural disaster including fire, flooding
and earthquake, etc.
• The fault is due to use of non-specified peripheral
equipment, peripheral parts, consumables, etc.
• The fault is due to use of a non-specified power supply
or in a non-specified installation location.
Inaddition,thiswarrantyisvalidonlyfortheoriginalequipment
purchaser. It is not transferable if the equipment is resold.
Anritsu Corporation will not accept liability for equipment faults
due to unforeseen and unusual circumstances, nor for faults
due to mishandling by the customer.
Anritsu Corporation Contact
If this equipment develops a fault, contact Anritsu Corporation or
its representatives at the address in this manual.

vi
Storage medium
This instrument uses floppy disks for storing data and programs.
Incorrect use of the floppy disks or errors can cause the data stored on the medium to be erased.
Back up the floppy disk as a precaution.
Anritsu will not compensate for loss of the stored data.
Note the following points when using this instrument. Especially, do not remove the floppy disk from the drive during disk
access. For details, see the main text of this manual.
• Satisfy the specified environmental conditions. Do not use this instrument in ;places subject to dirt.
• Clean head of floppy disk drive with 3.5 inch head cleaning disk set regularly.
• Keep floppy disks away from magnetized products. Do not bend the floppy disk.
Disposing of the product
The MP1763B uses chemical compound semiconductor including arsenic and timer including manganese dioxide Lithium
Battery and mercury.
At the end of it's life, the MP1763B should be recycled or disposed properly.

vii
CE Marking
Anritsu affix the CE Conformity Marking on the following product (s) in accordance
with the Council Directive 93/68/EEC to indicate that they conform with the EMC
directive of the European Union (EU).
CE Conformity Marking
1. Product Name/Model Name
Product Name: Pulse pattern Generator
Model Name: MP1763B
2. Applied Directive
EMC : Council Directive 89/336/EEC
Safety: Council Directive 73/23/EEC
3. Applied Standards
EMC:
Electromagnetic radiation:
EN55011 (ISM, Group 1, Class A equipment)
Immunity:
EN50082-1
Performance Criteria*
IEC801-2 (ESD) 4 kVCD, 8 kVAD B
IEC801-3 (Rad.) 3 V/m A
IEC801-4 (EFT) 1 kV B
*: Performance Criteria
A: No performance degradation or function loss
B: Self-recovered temporary degradation of performance or
temporary loss of function
Harmonic current emissions:
EN61000-3-2 (Class A equipment)
Safety: EN61010-1 (Installation Category II, Pollution Degree 2)

viii
(Blank)

I
Title of Contents
For Safety ....................................................................................................................... iii
SECTION 1 GENERAL ................................................................................................... 1-1
1.1 Features......................................................................................................................... 1-1
1.2 Specifications ............................................................................................................... 1-2
1.3 Options ......................................................................................................................... 1-8
1.4 Composition ................................................................................................................. 1-8
SECTION 2 PREPARATIONS ....................................................................................... 2-1
2.1 Environmental Conditions of Installation Site ............................................................. 2-1
2.2 Safety Measures............................................................................................................ 2-1
2.3 Power Supply Voltage .................................................................................................. 2-1
2.4 Internal Battery Life ..................................................................................................... 2-1
2.5 Damage Prevention Measures ...................................................................................... 2-2
SECTION 3 DESCRIPTION OF PANELS AND CONNECTORS............................. 3-1
3.1 FRONT PANEL ........................................................................................................... 3-2
3.2 REAR PANEL.............................................................................................................. 3-4
SECTION 4 OPERATING INSTRUCTIONS ............................................................... 4-1
4.1 Internal Clock Generator Frequency Setting (OPTION 01)......................................... 4-1
4.2 Generation Pattern Setting............................................................................................ 4-3
4.2.1 Logic modification .......................................................................................... 4-4
4.2.2 Alternate pattern setting .................................................................................. 4-4
4.2.3 DATA pattern setting ...................................................................................... 4-6
4.2.4 ZERO SUBSTITUTION................................................................................. 4-7
4.2.5 Pseudo random pattern setting ........................................................................ 4-8
4.2.6 ERROR addition ............................................................................................. 4-9
4.2.7 Tracking .......................................................................................................... 4-10
4.2.8 Pattern SYNC position .................................................................................... 4-11
4.3 Output Interface............................................................................................................ 4-13
4.3.1 DUMMY terminal voltage switching ............................................................. 4-14
4.3.2 Amplitude, offset, and delay setting................................................................ 4-15
4.3.3 Duty adjustment .............................................................................................. 4-17
4.3.4 Cross point adjustment .................................................................................... 4-17
4.3.5 Offset voltage setting range............................................................................. 4-18

II
4.4 MEMORY (Floppy Disk)............................................................................................. 4-22
4.4.1 File save........................................................................................................... 4-23
4.4.2 File recall......................................................................................................... 4-24
4.4.3 Disk formatting ............................................................................................... 4-24
4.4.4 File deletion..................................................................................................... 4-25
4.4.5 Error messages ................................................................................................ 4-25
4.4.6 Floppy disk ...................................................................................................... 4-26
4.4.7 Floppy disk precautions .................................................................................. 4-26
4.5 Parameters initialization ............................................................................................... 4-27
4.6 Functions of the FUNCTION Switch........................................................................... 4-28
SECTION 5 PRINCIPLES OF OPERATION............................................................... 5-1
5.1 Pseudorandom Pattern (PRBS Pattern) ....................................................................... 5-1
5.2 Pattern Synchronized Output Period ........................................................................... 5-3
5.2.1 Pseudorandom pattern ..................................................................................... 5-3
5.2.2 Programmable pattern ..................................................................................... 5-3
5.3 Bit shift for Alternate A/B select timing ..................................................................... 5-4
SECTION 6 PERFORMANCE TEST ............................................................................ 6-1
6.1 Test Equipment............................................................................................................. 6-1
6.2 Error Measurement ....................................................................................................... 6-1
6.3 Test Method.................................................................................................................. 6-2
6.4 Waveform Check.......................................................................................................... 6-3
6.5 Check Items .................................................................................................................. 6-3
SECTION 7 CALIBRATION .......................................................................................... 7-1
SECTION 8 MAINTENANCE ........................................................................................ 8-1
8.1 Daily Maintenance........................................................................................................ 8-1
8.2 Preparation for Shipment.............................................................................................. 8-1
SECTION 9 TROUBLESHOOTING AND REPAIR ................................................... 9-1
9.1 Before Considering Trouble ......................................................................................... 9-1
9.2 Fuse Replacement........................................................................................................ 9-2
.

1-1
SECTION 1
GENERAL
1.1 Features
The MP1763B Pulse Pattern Generator has two data output channels (DATA and DATA) and three clock output channels
(CLOCK1, CLOCK1, CLOCK2). The MP1763B is used with the MP1764A Error Detector to test high-speed digital
communication systems and high-speed semiconductors. It operates over the 50 MHz to 12.5 GHz frequency range and
generates four pulse patterns: alternate, programmable, zero substitution, and pseudorandom. Programmable DATA pat-
tern can generate data up to 8 M bits and send six STM-64(OC192) frames.
There are also seven 2N-1 (N=7, 9, 11, 15, 20, 23, 31) pseudorandom patterns. The pseudorandom pattern mark ratio can be
selected from among 0/8, 1/8, 1/4, 1/2, 1/2, 3/4, 7/8, and 8/8. Both 50ΩGND and ECL outputs are supported. The offset
and level can be varied. The clock (CLOCK1, CLOCK1) delay can also be adjusted by ±500ps in 1ps steps.

1-2
Section 1 GENERAL
1.2 Specifications
Operation
frequency range Internal Clock (OPTION 01) 0.05 to 12.5 GHz
Pattern
g
eneration PRBS
Continuous 0 pattern can be inserted up to pattern length -1.
Patterns:2,2 , 2 , 2
DATA 2to8388608 bits
2 65536 : Step 1 bit
65536 131072 : Step 2 bits
131072 262144 : Step 4 bits
262144 524288 : Step 8 bits
524288 1048576 : Step 16 bits
1048576 2097152 : Step 32 bits
2097152 4194304 : Step 64 bits
4194304 8388608 : Step 128 bits
Number of patterns A and B to be output can be specified.
Patterns A and B must be the same length.
Output control Internal/external switchable
A/B switching A/B each 1 to 127 times/step 1
128to4194304 bits/step 128 bits
Edit function All 0 / All 1 / page 0 / page 1
Logic
inversion Positive / Negative switching possible
[PRBS]
Positive Negative
H '' 0 '' H '' 1 ''
L '' 1 '' L '' 0 ''
[PRGM]
Positive Negative
H '' 1'' H '' 0 ''
L '' 0 '' L '' 1 ''
0.05 to 12.5 GHz
External Clock
2 -1 (N=7,9,11,15,20,23,31)
N
Pattern length
Mark ratio 1/2,1/4,1/8,0/8
(1/2,3/4,7/8,8/8 also possible by logic inversion)
Number of "AND
bit" shifts when setting
mark ratio
1 bit or 3 bits
(Selectable usin
g
rear
p
anel DIP switch)
DATA length
Edit function All 0 / All 1 / Page 0 / Page 1
Alternate
pattern
DATA length
Zero substitution
7 9 11 15
to
to
to
to
to
to
to
to

1-3
1.2 Specifications
CLOCK1/CLOCK1, CLOCK2 3 systems
Error
insertion Error ratio 1×10 (n = 4 , 5, 6, 7 , 8 , 9)
Insertion
position Insertion possible at any one of 32 channels
(Rear panel swith)
Error insertion by rising edge of external signal input
Insertion
position Insertion possible at any one of 32 channels
(Rear panel switch)
DISABLE
function Error insertion when external signal input level is "H"
1×10
Insertion
position Insertion possible at any one of 32 channels (Rear panel switch)
DATA is set to "0" while external signal input level is "L".
External
Clock Input 0.05to12.5 GHz
0.4 to 2.5 Vp-p
0.05 to 0.5GHz : Square wave only
> 0.5 GHz: Sine wave or square wave (duty 50%)
50Ω
Internal
External Eror
injection
Error ratio
Gating input
Frequency range
Input level
Input waveform
Input impedance
Connector SMA
Clock output Number of
outputs
Pattern
generation
-n
-n (n = 4 , 5, 6, 7 , 8 , 9)
CLOCK1
/ CLOCK1
CLOCK2
±500ps/1ps step
Amplitude 0.25 to 2.0 Vp-p/Step 2 mV
Setting error: ±15% (1.5 to 2.0 Vp-p), ±25% (0.5 to 1.5Vp-p),
Offset -2.0 to 2.0 V (V ) /Step 1 mV
Setting error: ±15% or ±15% of Amplitude, and100 mV,
Rise/fall times
(10%–90%) ≧8 GHz 1.5 to 2 Vp-p 35ps or less
＜8 GHz 1.5 to 2 Vp-p 50ps or less
≧8 GHz 1.0 to 1.5 Vp-p 40ps or less
＜8 GHz 1.0 to 1.5 Vp-p 55ps or less
≧8 GHz 0.25 to 1.0 Vp-p 45ps or less
＜8 GHz 0.25 to 1.0 Vp-p 60ps or less
15% or less or 150 mV, whichever is larger
Duty ratio adjust
function Duty ratio can be adjusted by semifixed variable resistor
50Ω(with back termination)
APC-3.5
V :
Amplitude: 1 Vp-p ±35%
50Ω (without back termination)
SMA
Waveform distortion
Load impedance
Connector
Delay range
Connector
Load impedance
Output level
OH
OH
or single
or single
±100mV(0.25 to 0.5 Vp-p)
0±200 mV
whichever is larger
50Ω/GND, 50Ω/–2 VTermination

1-4
Section 1 GENERAL
20ps or less (p-p)
7% or less, or 100 mV or less, whichever is larger.
50Ω(with back termination)
APC-3.5
NRZ
DATA, DATA 2 systems independence
0.25 to 2.0 Vp-p/Step 2 mV
Setting error: ±15% or ±100 mV, whichever is larger
–2.0 to 2.0 V (V ) /Step 1 mV
Setting error: ±15% or ±15% of Amplitude , and ±100 mV,
whichever is larger
≧5 GHz, amplitude 1 to 2 Vp-p 35ps or less (10-90%)
≧5 GHz, amplitude 0.5 to 1 Vp-p 40ps or less (10-90%)
≧5 GHz, amplitude 0.25 to 0.5 Vp-p 45ps or less (10-90%)
< 5 GHz 45ps or less (10-90%)
DATA
t1
t2
t3
t4
DATA
CLOCK1
CLOCK1
CLOCK2
t1 ≦30ps
t2 ≦30ps
t3 ≦30ps
t4 ≦30ps
CLOCK1/CLOCK1 delay set to 0ps
DATA output Output waveform
Number of outputs
Amplitude
Offset voltage
Rise / fall time
Pattern jitter
Waveform distortion
Load impedance
Connector
Output phase
OH
DATA/DATA
Tracking Amplitude and offset of DATA and DATA can be set to the same
value.
Termination 50Ω/GND, 50Ω/–2 V

1-5
1.2 Specifications
1/8 output 8 data outputs, 1 clock output
300 ps or less (20-80%)
100 ps or less (p-p)
Waveform distortion 15% or less
Skew 150 ps or less (relative to falling edge of 1/8 clock)
Output bit rate 1/8 of fundamental frequency
50Ω
SMA
Alternate pattern
A/B switching
in
p
ut
ALTN patterns A/B switching controlled by external signal
Input level
50Ω
SMA
Output level
Error injection
input Error inserted at rising edge by external signal
Input level 0/–1 V
50Ω
SMA
Error Error Error Error
Number of output
Output level
Rise / fall time
Pattern jitter
Load impedance
Connector
ABA
Input impedance
Connector
ABA
Output impedance
Connector
50Ω
SMA
ECL (H: –0.9 ±0.2 V, L: –1.75 ±0.2 V)
ECL (H: –0.9 ±0.25 V, L: –1.75 ±0.25 V)
ALTN patterns A/B switching signal output
ECL (H: –0.9 ±0.2 V, L: –1.75 ±0.2 V)
Input impedance
Connector
Fundamental frequency
Minimum pulse width 1×Data length
Fundamental frequency
Minimum pulse width 1x 32
Alternate pattern
A/B switching
output
Connector
50ΩLoad impedance
Output level V : 0±200 mV Amplitude: 1 Vp-p±20%
SMA
OH
Switching of 1/64 CLOCK, Fixed position pattern sync, and Variable
position pattern sync.
Sync. output
Data polarity Same as 1/1 DATA

1-6
Section 1 GENERAL
Error Disable
input Error ON/OFF controlled by external input signal
Error rate can be selected over this range
Input level 0/-1 V
50Ω
External
Gating
input
Output data control by external signal
Data
out
p
ut
Input level
50Ω
Parameter
memor
y
Medium 3.5 inch FD, 2HD, 2DD by 3 mode support
Format MS-DOS format (IBM-PC/NEC-PC selectable by rear panel DIP switch)
Stored data Programmable pattern/others
Mode switching
Display switching
Panel lock Disables all keys other than power switch.
GPIB GPIB connector for external control
Initialization
Operating
temperature
ran
g
e
0to50℃
Insulation
resistance 2MΩor more at 500 V
Dielectric
strength 1.5 kV, for 1 minute
Power
requirement 100 V system: 85to132 V 200 V system: 170to250 V
Frequency 50/60 Hz±5%
700 VA or less
Dimensions
& wei
g
ht 221.5±4H×426±5W×451±5D, 33 kg or less
Input impedance
Connector SMA
SMA
Input impedance
Connector
Display
Error
addition
Format, save, recall, resave, delete, search
V , V , V switchable
OH TH OL
External control GPIB interface for one system
Inirialized by Local + Power on
Fundamental frequency
1×32Minimum pulse width
0/-1 V
"0" "0"

1-7
1.2 Specifications
Option-01 Name Internal synthesizer
Frequency range 0.05 to 12.5 GHz
Output level 0.5 to 2.3 Vp-p
Resolution 1 kHz/1 MHz (switchable)
Frequency accuracy 1ppm (＊When synchronized with external signal, accuracy is
determined by external signal.)
Reference signal 10 MHz (internal/external switchable)
Signal purity SSB phase noise (10 kHz offset, bandwidth 1 Hz)
10.0
0.05 ≦Freq. < 2.0 GHz –90 dBc
2.0 ≦Freq. < 4.0 GHz –85 dBc
4.0 ≦Freq. < 8.0 GHz –80 dBc
8.0 ≦Freq. <10.0 GHz –75 dBc
≦Freq. ≦12.5 GHz –70 dBc
Spurious radiation At clock output terminal
Nonharmonic –70 dBc or less (off carrier 10 kHz or more)
Power supply –40 dBc or less
Load impedance 50Ω
Connector SMA
Option-03 Name 1/4 SPEED OUTPUT
Number of output 4 data outputs, 1 clock output
Output bit rate 1/4 of fundamental frequency
Amplitude 0.5 to 2.0 Vp-p/Step 2 mV
Setting error: ±15% or ±100 mV, whichever is larger
Offset voltage –1.5 to +1.5 V (V
OH )/Step 1 mV
Setting error: ±15% or ±15% of Amplitude, and ±100 mV,
whichever is larger
Rise/fall time 150ps or less (20-80%)
Pattern jitter
15% or less
Skew
Output impedance
The 1/4 data cross point is within ±100ps relative to the falling edge
of the 1/4 clock.
Connector SMA
*
50Ω
Waveform distortion
100ps or less (p-p)
Data polarity Same as 1/1 DATA
Termination 50Ω/GND, 50Ω/–2 V
* When OPTION 03 is installed, there is no 1/8 output.

1-8
Section 1 GENERAL
1.3 Options
The following options are available:
OPTION 01 Internal synthesizer
OPTION 03 1/4 SPEED OUTPUT
1.4 Composition
The standard composition of the MP1763B Pulse Pattern Generator is shown in Table 1.4-1.
Table 1.4-1 MP1763B Standard Composition
Item
Main Unit
Accessory
Application
parts
No.
MP1763B
J0500A
J0672E
J0496
J0693
J0491
J0008
F0071
Z0168
Z0306A
M-W1023AE
M-W1024AE
Z0481
MB24B
B0163
B0171
B0044
Z0416
Name
MP1763B Pulse Pattern Generator
Semirigid cable (50 cm)
Semirigid cable (10 cm)
Conversion connector
SMA cable (1 m)
Shield power cord
GPIB cable (2 m)
Fuse
3.5 inch floppy disk (2HD)
Wrist strap
Operation manual
GPIB Operation manual
12.5G/3.2G BERTS APPLICATION
SOFTWARE DEMO
Caster
Portable carrying case
Protective carrying case
For mounting kit 1MW ¥ 5U
3.5 inch head cleaning disk
Qty
1
2
1
4
1
1
1
2
2
1
1
1
1
APC ¥ 3.5J-APC ¥ 3.5J
13A (2.6 m)
408JE-102
MF51NR8A
Formatted *
with 20A power cord/plug
2 pcs/set
* The capacity of the formatted type is 1,440 kilobytes. The quasi PRBS2
10–1 patterns (mark ratio 1/2, 1/4, 1/8) are saved
on one floppy disk.
.

2-1
SECTION 2
PREPARATIONS
2.1 Environmental Conditions of Installation Site
Do not use and store the instrument in the following locations:
• where vibrations are severe.
• where it is damp or dusty.
• where there is exposure to direct sunlight.
• where there is exposure to active gases.
Long-term storage at high temperatures will shorten the life of the internal battery. Store the instrument below normal room
temperature.
Operating temperature range 0℃to 50℃ (However, 5℃ to 40℃ for floppy disks).
Storage temperature range -40℃ to 70℃
2.2 Safety Measures
• Use the attached power cord to connect the AC power supply. Ground the ground terminal of the power cord or the
frame ground terminal on the rear panel of the instrument.
• When changing the fuse, always use a fuse of the same rating. (See the fuse replacement item.)
• If the instrument is operated at room temperature after being used or stored for a long time at low temperature, conden-
sation may occur and cause short-circuiting. To prevent this, do not turn the power on until the instrument completely
dry.
2.3 Power Supply Voltage
The power supply voltage for this instrument is shown on the rear panel. Use a voltage within the rated voltage range.
Excessive voltage may damage the circuits.
2.4 Internal Battery Life
This instrument uses a lithium primary battery as the timer and memory back-up power supply. The life of this battery is
7years or more when the instrument is stored at normal room temperature. However, since the battery life largely depends
on the storage temperature, storage at high temperatures for long periods will shorten the period above. Replace the battery
of which period is exceeded. The internal battery cannot be recharged.