HP 3320A Operating And Service Manual page 21

Model 3320A/B
Section III
Figure 3-5. Programming Example.
RFD LOW and DAC HIGH, the external controller can
remove the DAV and the data from the data lines and
replace
it
with new data. The cycle repeals until all
programming is completed. Figure 3-6 shows the timing
relationship between the DAV, RFD, and DAC signals.
,- Function Execute
D - delay preface
I - dclay code (60 ms)
C - Delay Initiate
ASCII
Programming
Characters
Example: To program a delay of 60 ms,
3-52. Delay Flag.
3-51. The RFD line is also controlled by the delay
programmed (See Paragraph 3-52). As soon as a Delay
Initiate code (Octal code I OJ) is programmed, the RFD will
remain LOW for the length of time programmed by the
delay. If the RFD Signal is monitored, the user can be sure
the 3320B amplitude and frequency has settled to the
desired tolerance when the RFD goes HIGH.
3-50. It is not necessary for the external controller to
monitor the RFD or DAC signals. However, if these signals
are not monitored, the external controller must wait
approximately three microseconds before removing the
LDAV and the data from the data lines and applying new
data, and approximately two microseconds before setting
DAV LOW again. This ensures the 3320B has had time to
accept and process the previous data.
3-53. The delay is generated by an internal clock which
counts for the time internal programmed on the data lines.
At the end of the count sequence, the clock outputs a flag
to the external controller (delay flag or RFD). This flag can
be monitored to determine the accuracy which the 3320B
frequency and amplitude has settled. Table 3-7 lists the
delay codes, the clock time interval, and the tolerances
which the frequency and amplitude have settled. The
programmed delay code must be followed by a Delay
Initiate (ASCII character C). This code initiates the delay
sequence. The Delay Initiate code does not have to be
followed by a Function Execute code.
It~ ~~;t"A"
~."~
NO
o~
I
""E
~ ~
..
'00' ' 0 0
,co,
.(1
"
.:
.
,
,
-
,
Clu,
•
0:_
•
-:-
• •
-
,
•
~:-
•
oio
• •
-
,
0
-:.-.
•
oio
•
0
-
·
•
0
0:_
•
0:_
0 0
-
,
0
0:_
0
-:-
0 0
-
•
,
0
-:=
0
0:_
•
0
-
,
,
0
0:_
•
0:_
0
•
-
•
0
~
c:_
•
O:D
0 0
,
0
t::l:_
0
-:-
0 0
-
•
0
_:0
0
-:-
0
•
-
"
"
0
.:
0 0 CJ:Cl 0
•
-
•
-
" 0
0 :
•
0
-:-
0
•
"
,
0
0 :
• •
0:_
0
•
-
-
"
,
0 0 ,
• •
0 ' 0
0 0
"
,
0
0 :
• •
0 : 0 0 0
-
" 0
0:_
0
-:-
0 0
"
0
_ :0
0
0: _
0 0
-
0
"
,
0
0;_
•
O:D
0
•
-
" 0
0:_
0
-:-
0 0
"
,
0
_:0
0
O:Cl
•
•
" 0 0 : 0 0 0 : 0 0 0
-
"
0
0 : 0
0
Cl:Cl
0 0
" 0 0 ' 0 0 O:D 0 0
-
" 0
t::l:o
0
0 : 0
0 0
" 0
0 : 0
0
Cl:O
0 0
-
" 0
0 ' 0
0
oio
0 0
"
0
Cl:Cl
0
Cl:=
0 0
"
0
Cl:O
0
0:=
0 0
"
0 0 ' 0 0 0 ' 0 0 0
00
0 0 : 0 0
Cl:O
0 0
" 0 0 ; 0 0 0 : 0 0 0
"
0 °io 0
0 : 0 0
0
,
uS>:
SO"' P(NC«
~
no
NOt ....P" IN SHADED "PU <TOP,
J. [USE CO"~l('fU'
• 'NYO' lH'S "OE UP
._._.
"P ••" " . " . " "
"' . _
..
,
Ampli'u<lO·· 5 <18m
vom;'" -out
Dollly ·00 ....
AOOrtsS·263
Table 3·7. Settling Times.
Remote Control
3320 Operation
Frequency
Frequency of Delay
Leveling Settling Tolerance Amplitude
Operation Code Mode
Time
(%
of Range) Tolerance
~1000
Hz 0
On
15 ms
.01
1
On
60 ms
.00'
2
On
300 ms
,%
10Hz
~ f ~
1000 Hz 3'
On
1500 ms "
~10
Hz
4
Off
15 ms
.0'
5
Off
60 ms
.00'
6
Off
300 ms
,%
7
Off
150p ms "
* Use delay code 3 to eliminate distortion caused by low frequency and leveling on.
**
Denotes amplitude within rated accuracy.
3-7