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Inaccuracy
Inaccuracy, i.e., the relative error, depends on the follow-
ing factors:
resolution
FREQ PERIOD RATIO or TIME
,
,
±
relative trigger error
±
relative time base error
±
relative systematic error
Relative Trigger Error
Freq A, Period A:
noise voltage A Vp p
(
±
×
signal slope A V s
(
)
meas time
Ratio A/B:
noise voltage B Vp p
(
±
×
signal slope B V s
(
)
meas time
Totalize A, Gated or Start/Stop by B:
noise voltage B Vp p
(
±
×
signal slope B V s
gate time B
(
)
Time A-B:
−
noise voltage A Vp p
(
±
×
signal slope A V s
(
)
TIME
−
noise voltage B Vp p
(
±
×
signal slope B V s
(
)
TIME
Relative Time Base Error:
deviation from 10 MHz
±
10 MHz
Relative Time A-B Systematic Error: Inaccuracy
caused by timing difference between A and B channels
<±4 ns/TIME
General Specifications
Power Requirements
Line Voltage:
115V or 230Vrms ± 15%; 45 Hz to
440 Hz; 20 VA PM 6666 including all options
Safety:
In accordance with IEC 348 Class 1 and CSA
556B, CE
Line Interference:
Below VDE 0871 B and MIL STD
461, CE
Battery Unit:
See PM 9605 option
PM 6666 - OPERATORS MANUAL
,
−
)
−
)
−
)
)
×
N
)
×
N
SPECIFICATIONS
Time Base (Crystal oscillator)
Stability
Against
Aging
Per Month
Per Year
Temperature
Changes
0°C to 50°C
Line Voltage
Changes 10%
Display
Readout:
9-digit LCD with unit and cursor indication
Unit Indication:
M, k, m, µ and n.
GATE Indicator:
ing
REMOTE Indicator:
motely controlled via an installed GPIB/IEEE-488 interface
(PM 9604)
Cursor:
Indicates selected measuring function, se-
lected Measuring-time, input triggering, display hold and
whether an external reference frequency is in use.
Environmental Data
Temperature
Operating: 0°C to + 50°
Storage: –40°C to +70°
Altitude
Operating: 5000m (53.3 kN/m
Storage: 15,000m (15.2 kN/m
Humidity
Operating: 10% to 90% RH, no condensation
Storage: 5% to 95% RH
Vibration Test:
Bump Test:
Handling Test:
Mechanical Data
Size:
186 mm W x 88 mm H x 270 mm L (7.3 in W x
3.5 in H x 10.6 in L)
Weight:
2.1 kg (4.6 Ib)
Oscillator Version
Standard
MTCXO
–7
<5 x 10
(5Hz)
–6
<5 x 10
(50Hz)
–5
<1 x 10
(100Hz)
–8
<1 x 10
(0.1Hz) <1 x 10
MHz, kHz, Hz, mHz, ks, s, ms, s, ns,
Indicates that the counter is measur-
Indicates when the counter is re-
2
)
2
)
According to IEC 68Fc
According to IEC 68Eb
According to IEC 68Ec
–7
<1 x 10
(1Hz)
–7
<5 x 10
(5Hz)
–7
<2 x 10
(2Hz)
–9
(0.01Hz)
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