HP 5355A - Page 31

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Model

5355A

Operation

and

Programming

d.

If

the

signal

is

of

sufficient

amplitude

to

light

the

5355A

SIGNAL

indicator,

the

signal

will

be

automatically

measured

and

displayed

on

the

5345A.

e.

[

*

j)^

c

,

r

indicator

light

should

be

on.

3-38.

Pulsed

RF

Signal

Operation

3-39.

Use

the

same

procedures

as

in

CW

Signal

Operation

(paragraph

3-37)

except

as

follows

(see

Table

3-2):

NOTE

In

the

following

step,

use

of

a

cable

of

different

length

maycause

measurement

errors.

a.

Connect

the

GATE

OUT

connector

on

the

rear

panel

of

the

5355A

to

the

GATE

CON¬

TROL

INPUT

connector

on

the

rear

panel

of

the

5345A,

using

the

10502A

cable

provided.

b.

Place

the

5345A

GATE

CONTROL

switch

to

INT.

(In

this

switch

position

a

control

signal

from

the

5355A

automatically

sets

the

5345A

to

EXT

GATE

mode

when

PULSE

mode

on

the

5355A

is

selected

and

to

INT

GATE

mode

when

CW

mode

on

the

5355A

is

selected.

However,

older

5345A's

with

Serial

Prefix

1744A

and

below

do

not

have

this

capability.

For

these

5345A’s

when

in

PULSE

mode,set

the

5345A

GATE

CONTROL

switch

to

EXT

and

when

in

CW

mode,

set

the

switch

to

INT.

A

minor

modification

(see

paragraph

8-13)

can

be

made

which

updates

the

older

5345A's

for

automatic

selection

of

EXT/I

NT

GATE.)

c.

Press

[

•

)]

key

on

the

front

panel

of

the

5355A.

NOTE

In

the

5355A's

PULSE

mode,

a

calibration

factor

is

automatically

computed

during

the

first

10

measurements

(a

O

is

displayed

in

the

5345A's

most

significant

digit

to

indicate

that

the

calibration

factor

is

being

computed).

All

subsequent

frequency

measure¬

ments

are

multiplied

by

the

calibration

factor

in

order

to

reduce

the

effects

of

error.

The

calibration

factor

remains

unchanged

unless

the

external

gate

width

changes

by

more

than

12%

in

which

case

another

calibration

factor

is

computed.

The

accuracy

specification

applies

to

readings

after

the

first

10

(see

Table

1-1).

3-40.

Manual

Signal

Operation

a.

Press

('•

||**

r

Q

s

key

and

use

the

or

[

•

|

ll

™

1

to

enter

a

manual

center

frequency

that

is

within

50

MHz

of

the

input

signal

frequency.

0

M

AN

key

again

to

release

the

DATA

ENTRY

mode

and

press

I

®

]

MANUA

-

key

$7£!*>

^TTTTTT^y

;,/PA

'

P

to

enter

the

MEASUREMENT

mode.

3-9

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