Anfatec eLockIn 203, Руководство пользователя

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3.1.4 R
EAR
P
ANEL
The back side panel provides
8 x BNC connectors for the internal A/D converters (-10 V .. 10 V) “Aux In”
4 x BNC for displaying the selected channels scaled as analogue outputs (DACs)
“Display”
4 x BNC for Aux Out DACs “Out”
2 x BNC Ref-In connector for the reference input (“Ref In 1” for standard PLL,
“Ref In 2” for LoL mode option)
2 x BNC for monitoring the amplified input signals A and B called
“Monitor A” and “Monitor B”
BNC Out for 10 MHz reference clock “10 MHz Out”
BNC Out for TTL reference output “TTL Out”
BNC Out for sine wave reference out on 2
nd lockin frequency “Ref2”
LAN (RJ45) network connector for remote control
the 100 -240 V AC power supply (tested from minimum 100 V AC)
3.2 T
HE
L
OCK
I
N
M
ENU
[ L
OCK
I
N
]
3.2.1 I
NPUT
S
ETTINGS
[ L
OCK
I
N
/ I
NPUT
]
Input Range [ LockIn / Input / Range ]
This setting changes the input amplification of the lock-in input stage by two hardware
switches controllable from the software. These factors are according to the range value
of “high dynamic reserve”, “normal” and “low noise”. Together with the input
amplifications, dynamic range and sensitivity change. The lower the dynamic range, the
higher the sensitivity is. The strategy for selecting a suitable
range
is: Choose the
smallest value which is just bigger than the maximum input signal.
Example: When the maximum input signal is 300 mV
pp
, the “low
noise” input range will yield an overflow. The “normal” and “high
dynamic reserve” input ranges are both possible, but the “normal”
range gives the better sensitivity.
20 (58)
Figure 11: Rear-Panel of the
eLockIn
(picture might very from current revisions). The
ground connector above the power supply allows to separate the protective ground from
the housing and thus increase the resistance between them to 1 MOhm.