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Model Series 3000
1.6. OPTIONS
1-6. Table 1-2 lists the options that are available for the 3000 Series counters.
Oscillator Options Available:
OPTION:
OCXO
Aging/second:
5 x 10
root Allan variance
-9
Aging/day:
3 x 10
Aging/year:
5 x 10
-8
Warm-up (time):
1 x 10
@ 25°C
-8
Retrace:
2 x 10
after 72 hrs. ON,
@ 25°C
24 hrs. OFF, 12 hrs. ON
Temperature:
2 x 10
(0°C to 50°C)
MAINS change:
5 x 10
±
(
10%)
Calibration Schedule:
1 year
Note : Election of Rubidium Osc. Option 125 extends counter chassis depth from 13.1 in. (333 mm) to 14.5 in. (368 mm).
Rubidium oscillator, option 125, is not available with Battery Option 150 counters.
Other Options:
150:
Battery Option. AC MAINS and Internal Battery Powered CW counter. This option includes a Weather-Resis-
tant Instrument Back-Pack and a 12 VDC/2.3 Ah Rechargeable sealed Lead/Acid Battery (approx. 3 hour operat-
ing time per full charge). The battery will recharge whenever the counter is connected to AC Mains.
Note: In addition to the standard TCXO oscillator, OCXO oscillators (Option 112 & 120) are also available with
the Battery Option. Rubidium Oscillator Option 125 is not available with Battery Option 150 counters.
Battery and Back pack are excluded from instrument's warranty.
Dual Battery Operation. 2nd Battery, with cable, for dual battery operation to extend operating time* *
152:
(requires Option 150).
160:
OCXO Oven Always ON. Provides constant power to OCXO oven circuitry with Battery operation
(shortens battery operating time* * )(requires Options 150 & 112 or 120 OCXO).
170:
Rack Ears: 3.5 in. x 19 in. (88.9 mm x 482.6 mm) (H x W) (EIA RS-310).
NOTE: ALL OPTIONS ARE INSTALLED BY FACTORY ON ORIGINAL INSTRUMENT ORDER.
3000/98MAR01
GENERAL INFORMATION
Table 1-2. Options
112
√τ
-10
/
after 30 days
-7
in 30 min.
5 x 10
24 hrs. OFF, 5 min. ON
-8
(7 x 10
-9
* * Operating times with Options 152 & 160, consult Factory.
120
OCXO
/√τ
-12
5 x 10
root Allan variance
-10
4 x 10
-8
5 x 10
-8
5 x 10
in 30 min.
-9
after 72 hrs. ON,
-9
7 x 10
-9
-30°C to 70°C)
-9
2 x 10
1 year
Chapter 1
125
RUBIDIUM
(see Note)
√τ
-11
1.4 x 10
/
root Allan variance
-11
2 x 10
after 60 min.
-9
2 x 10
-10
5 x 10
in 4 min.
-11
5 x 10
after 72 hrs. ON,
24 hrs. OFF, 1 hr. ON
-11
3 x 10
N/A
1 year
1-8
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