RF Neulink NL5000 Rev B0 - Manual (Page 21)

NL5000 User Manual Rev B0 20
however, usually work best with de-emphasis selected. Factory default is
for flat response.
RX Discriminator Coupling Selects whether the coupling from the
discriminator output on the RF board is AC or DC coupled to the
control/loader board. Since the audio outputs of the modem board are
AC coupled, this function is normally set for AC as well. For response
to DC, modifications must be made to the modem board. The factory default
is AC.
CD Output Logic Level Allows the setting of the polarity of the Carrier
Detect output. Active high means that the true state is a logic high while
active low means that the true state is logic low. Normal setting is active
high. The factory default is active high.
Squelch Enable Allows the receive audio paths to be muted when the
carrier detect output is false. Used to prevent the output of noise from the
audio outputs when no signal is present. The factory default is for this
function to be set for squelch on.
Flow Control Sets the method of controlling the flow of data between the
host device and the radio modem. Three selections are available, none,
hardware, and Xon/Xoff. If ‘none’ is selected, no flow control is provided i.e.
the modem and host must accept data anytime the other has data to send.
Hardware flow control refers to the use of the RTS/CTS lines to control the
data from the host to the modem. (There is no flow control in the opposite
direction.) Xon/Xoff refers to flow control using special characters in the
data stream itself to control data flow.
6.6.3.3 Alignment
The alignment menu is password protected and is used during the
alignment process. Details on its use may be found in the Maintenance
Section (Section II) of the complete manual.
6.6.3.4
Modem
The modem menu allows the modem source and destination addresses to
be set up as well as allowing the setting of various protocol parameters.
Source Station ID Sets the address of the modem itself. It is made up of 4
parts, from most general to most specific: System ID, Group ID, Unit ID, and
Sub-unit ID.
Default Destination ID Sets the destination ID of the intended recipient.