Racal Instruments 2151 Manual page 10

Math:
Standard Output:
Multiply
Offset
Smooth
Used
to
multiply readings by
the
factor held in the
Mul
tipiy store
Frequency
(user defined
number)
Level
Used
to automatically
offset
readings by
the
factor held in
the
offset store.
The
factor
may
be
the
current reading
or a user defined
impedance
number.
10
MHz
TTL
compatible giving approxi-
mately
IV
p-p
into
50 ohms
90 ohms
nominal
Selects a running
average
function
Maximum
reverse
re solution
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e
t^to^
the
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ied
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15V
with
n
°
P
eImanent
of the input signal
T1MEBASE
SPECIFICATIONS
GENERAL
SPECIFICATIONS
Internal Standard:
(TCXO)
Gate Times
Frequency
10MHz
Range
Adjusiment
Range
Aging
±
5ppm
min.(multiple turn
trimmer)
lppm7year
Sample
Rate
Temp.
Stability
±
lppm
max. with
respect
to
frequency
at
25
D
C
from
0
D
C
to
40
D
C
Front
Panel:
External Standard
Input:
Indicators
Frequency
10MHz
Signal
Range
Damage
Level
lOOmV
rms
(sine)tolOVrms
(sine)
10V rms
(sine)
Input/Output
Connectors
Input Impedance lkohm
nominal
for signals
<
IV
pk-pk
500
ohm
nominal
for signals
> 10V
pk-pk
Coupling AC
coupled
VXlbus "CLK10"
Standard
A
10
MHz
system
clock
is
sourced
from
the
VXlbus
slot 0
controller,
distributed
on
connector
P2,
differential
ECL
Rear
Panel
Components
Reference Clock
If
an
external
10MHz
reference
is
connected
via front panel
input,
it
will automatically
override
the
internal
TCXO
reference.
This
is
the
''counter reference"
Side Panel
Components
Interface
commands
enable
selection of reference
from
"counter reference"
or from
"CLK10"
input
available on
VXlbus
backplane
Check
10MHz
displayed
Automatically
determined
depending on
resolution selected
lmSec
to
20Sec
(lOSec
max.
for
channel C)
Rate
selectable
and
the value
displayed
Fail
:
Red
Active
:
Amber
Gate
;
Green
Power
:
Green
A
channel input
(BNC
female)
B
channel input
(BNC
female)
C
channel input
precision
connector,
PC
3.5
female)
External standard input (BNC
female)
10MHz
standard output (BNC
female)
IF
output
for
Channel
C (BNC
female)
VXlbus
interface sockets
Pi and
P2
(96-pin
DIN
pattern)
Logical address selection switches
interrupt
level selection switch
2151
OPS
A1571/DA
AL01/Iss.01/03.94