HP 10811A, Operating & Service Manual

Page: 11 / 73

Model 10811A/B
3
Table
1-1.
Specifications Table
Frequency Stability : (See Definition
of Terms)
Long Term (Aging Rate)
: <5 X 10
-10
/day
after 24-hour warm-up. See Note 1.
<1 X 10
-7
/year for continuous operation.
Short Term
: Refer to tables and figures
above.
Environmental Sensitivity:
Temperature
: <4.5 X 10-9 over a -55°C to
71°C range. <2.5 X 10-
9
over a O°C to
71 °c range.
Operating
:-55°C to +71 °C.
Storage:
-55°C to X85°C.
L
oad
: <5 X 10
-10
for a ±10% change in 50
ohm load. <5 X 10
-10
for a ±25% change in
1K Ω load.
Power Supplies:
Oscillator Supply
: <2 X 10
-10
for 1%
change. <100 μ v ripple and noise required.
Oven Supply:
<1 X 10-
10
for 10% change.
<30 mv ripple and noise required.
Gravitational Field
: <4 X 10
-9
for 2g static
shift (turn-over).
Magnetic Field
: <-90 dBc sidebands due
to 0.1 millitesla (1 Gauss) rms at 100 Hz.
Humidity (typical):
1 X 10
-9
for 95% RH at
40°C.
Shock (survival):
30g, 11ms, ½ sinewave
.
Altitude (typical): 2 X 10-9 for 0 to 50,000 ft.
Warmup
10 min. after turn-on within 5 X 10-9 of final
value, at 25°C and 20 Vdc. See Notes 1 &
2.
Adjustment
Coarse Frequency Range
: >±1 X 10
-6
(±
10 Hz) with 18 turn control.
Elec. Frequency Control (EFC)
: ≥ 1 X 10
-7
(1 Hz) total, control range -5 Vdc to +5 Vdc.
Output
Frequency:
10 MHz
Voltage
: 0.55 ± 0.05 V rms into 50 ohm.
1V rms ±20%, into 1K ohm.
Harmonic Distortion
: Down more than 25
dB from output.
Spurious Phase Modulation
: Down more
than 100 dB from output (discrete
sidebands 10 Hz to 25 kHz).
Power Requirements
Oscillator Circuit:
11.0 to 13.5 Vdc. 30
mA typical. 40 mA max.
Oven Circuit:
20 to 30 V dc; turn on load
is 42 ohm minimum. Steady-state power
drops to a typical value of 2.0W at 25°C in
still air with 20 Vdc applied.
Connectors
10811A: Mates with CINCH 250-15-30-210
(HP 1251-0160) or equivalent (not
supplied).
10811B: Solder terminals and 5MB Snap-
on connectors. Mates with Cablewave
Systems, Inc. #700156 or equivalent (not
supplied).
Accessories Available:
Service Manual
: HP 10811-90002: (not
supplied). This Manual.
Size
:
72 mm X 52 mm X 62 mm, (see Figure
1). (2-13/16" X 2-1/32" X 2-7/16", 14 cu.
in.).
Weight: 0.31 kg (11 oz.)
Definition of Terms
Long-Term Frequency Stability
is de-
fined as the absolute value (magnitude)
of the fractional frequency change with
time. An observation time sufficiently
long to reduce the effects of random
noise to an insignificant value is implied.
Frequency changes due to
environmental effects must be
considered separately.
Time Domain Stability
σ
γ
( τ )
(Allan
deviation) is defined as the two-sample
deviation of fractional frequency
fluctuations due to random noise in the
oscillator. The measurement bandwidth
is 100 kHz.
Frequency Domain Stability
is defined
as the single sideband phase noise-to-
signal ratio per Hertz of bandwidth (a
power spectral density). This ratio is
analogous to a spectrum analyzer
display of the carrier versus either
phase modulation sideband.
See "NBS-Monograph 140" for
measurement details.
Notes:
1. For oscillator off-time less than 24
hours.
2. Final value is defined as frequency 24
hours after turn-on.
*Specifications describe the instrument's warranted performance. Supplemental characteristics are
intended to provide information useful in applying the instrument by giving TYPICAL or NOMINAL, but
non warranted performance parameters. Definition of terms is provided at the end of the specification
section.