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Specifications
THS710A, THS720A, THS730A & THS720P Service Manual
1–11
Table 1–3: General specifications (Cont.)
RS-232 Interface
Device Type DTE. at RJ-45 connector
Pinout Signal Pin Number at
9-pin Null
Modem Adapter
Pin Number at
RJ-45
Connector
RTS out 1 8
TXD out 2 6
RXD in 3 5
GND 5 4
DTR out 6 3
CTS in 7 7
RTS out 8 8
DSR in (not used) 4 2
DCD in (not used) 7 1
Probe Compensator Output
Output Voltage,
typical
5.0 V into ≥1 MW load
Frequency, typical 1.2 kHz
Power Source
Battery Replaceable Ni-Cd battery pack
Battery Life, typical Approximately two hours of continuous use from a full charge
Low Battery Indica-
tion, typical
Low battery message first appears approximately ten minutes before
the instrument powers off automatically
Battery Saver Standby Time-out and Backlight Time-out extend battery life. Time-out
ranges from 1 minute to 15 minutes, or off.
Batt
ery
C
ha
r
ging
Time, typical
With TekScope instrument operat-
ing
9 hours
With TekScope instrument turned
off
9 hours
In external charger 1.5 hours
External Power 12 VDC nominal, center positive; Operates with input from 10 VDC to
15 VDC
The DC INPUT disconnects itself automatically if >15 VDC is applied.
If this occurs, disconnect the overvoltage and then reconnect to a
voltage in the proper range.
Memory Retention,
typical
All memory is retained indefinitely with battery removed and without
external power applied.
Fuse This instrument has no user-replaceable fuses