1450A/02-AH Manual
5/10
Copyright 2003 Novatech Instruments, Inc.
10/5/2005
MR- is the master reset signal (guaranteed for Factory Use Only). When LOW all the circuitry
internal to the 1450A/02-AH is reset. Upon returning HIGH, the 1450A/02-AH will initialize in less
than 250ms and output a frequency of 10.0MHz and 0
o
phase. Toggling MR- performs the same
function as cycling power. An internal reset is issued upon change of the MODE switch. MR- must be
low for at least 1ms.
After a power cycle, mode change or MR-, the 1450A/02-AH takes approximately 500msec to
Table 1: Timing, Independent Mode.
Parameter
Name
Min
Max
Notes
T
su
Binary Data Setup
25ns
Binary Data Stable before PFn.
T
ld
PF Pulse Width Low
100ns
Minimum PF pulse width.
T
b
Busy Time
430ns
BUSY is HIGH for internal data
transfer.
T
nf
New Frequency Time
600ns
New frequency on output.
T
zd
Zero Decay Time
10
µ
s TYP
Time for Output to decay to ±100mV
after setting frequency to zero (Sine
output only). Square wave output may
be erratic during this time.
T
d
Busy LOW to output
170ns
Time for new output to stabilize after
BUSY returns LOW.
T
cyc
Load cycle time
600ns TYP
Cycle time before next PF.
Input (Independent Mode) Timing Diagram (Not to Scale)
T
su
T
ld
T
b
FREQ
n
FREQ
n+1
T
nf
FREQ
n+2
T
zd
PFn
FB
BUSY
OUT
T
cyc
