Hi folks -
I am analyzing a system which I know has a base of 150.8 MHz and step of 5kHz. This is what Unitrunker shows and it is confirmed by the fact that LCN 1004, reported in the HP1 Activity Log as the control channel, is indeed the frequency 155.82 I was monitoring when running the activity log.
So when I get this line in the activity log (and others with similar info), how do I translate it? No mathematics I have tried make this work.
I have the PDF explaining the activity log and I know that Bw stands for bandwidth, Tofs is Transmit Offset, Csp is Channel Spacing, and Bfrq is Base Frequency. They're all listed as being in "decimal".
Bandwidth - 5 kHz?
Transmit offset - 128.. channels? kHz? The LcnT shown by the activity log is not 128 channels either up or down from the LcnR. In fact, it's not consistently a set "distance" from the other, and may sometimes be higher than the CC LCN, sometimes lower.
Channel spacing: 40 kHz presumably? Can I use this to help figure out LCNs?
Base frequency: 30.16 MHz? Is that what the above shows? I don't understand how that frequency corresponds to the 150.8 freq I know is the actual base.
I have a couple of reasons for asking. One is because while most sites I am analyzing have only the above one line, "Iden: 0", there are one or two with multiple "Iden"s, i.e. "Iden: 1", "Iden: 2", etc. I presume that refers to different band plans.
The other reason is one site is reporting an LcnT of 4872, consistently. This puts the LcnT in the 175 MHz range, well outside proper values in this part of the world. Other sites report a valid LcnT and I am able to confirm they're in use. I am used to LCNs being from 0 to 4096 within a band plan "block" (I presume "Iden: x" is the equivalent of a block).
Any help will be greatly appreciated!
I am analyzing a system which I know has a base of 150.8 MHz and step of 5kHz. This is what Unitrunker shows and it is confirmed by the fact that LCN 1004, reported in the HP1 Activity Log as the control channel, is indeed the frequency 155.82 I was monitoring when running the activity log.
So when I get this line in the activity log (and others with similar info), how do I translate it? No mathematics I have tried make this work.
Code:
09/15/2011 05:31:12 "34,B4000502002801CC3480445A" Identifier Update for VHF/UHF Bands Iden:0 Bw:5 Tofs:128 Csp:40 Bfrq:30160000
I have the PDF explaining the activity log and I know that Bw stands for bandwidth, Tofs is Transmit Offset, Csp is Channel Spacing, and Bfrq is Base Frequency. They're all listed as being in "decimal".
Bandwidth - 5 kHz?
Transmit offset - 128.. channels? kHz? The LcnT shown by the activity log is not 128 channels either up or down from the LcnR. In fact, it's not consistently a set "distance" from the other, and may sometimes be higher than the CC LCN, sometimes lower.
Channel spacing: 40 kHz presumably? Can I use this to help figure out LCNs?
Base frequency: 30.16 MHz? Is that what the above shows? I don't understand how that frequency corresponds to the 150.8 freq I know is the actual base.
I have a couple of reasons for asking. One is because while most sites I am analyzing have only the above one line, "Iden: 0", there are one or two with multiple "Iden"s, i.e. "Iden: 1", "Iden: 2", etc. I presume that refers to different band plans.
The other reason is one site is reporting an LcnT of 4872, consistently. This puts the LcnT in the 175 MHz range, well outside proper values in this part of the world. Other sites report a valid LcnT and I am able to confirm they're in use. I am used to LCNs being from 0 to 4096 within a band plan "block" (I presume "Iden: x" is the equivalent of a block).
Any help will be greatly appreciated!