I spent about an hour or so at Downtown Manhattan (with a great view of Jersey City to Edison) searching up and down the 764-780 MHz band and to my surprise came up with 5 control channels! I used a PSR-500 using the RH77CA antenna.
All have system ID 39A and WACN BEE00
764.76875 MHz - Site ID 123, Tower 117 Site Trunking Mode
774.78125 MHz - Site ID 101, Tower 101 Site Trunking Mode (Very strong)
770.40625 MHz - Site ID 133, Tower 121 Site Trunking Mode (Very strong)
770.93125 MHz - Site ID 123, Tower 117 Site Trunking Mode (Very Strong)
773.76875 MHz - Site ID 101, Tower 101 Site Trunking Mode (weak)
No voice traffic were heard on any of them.
Here's a Pro96Com decode file if anyone is interested,
3B 00 00 BE E0 03 9A 17 5E 60 25 27 08/19 16:17:41 Network Status Broadcast - WACN: BEE00 Control: 1-1886(773.79375) Cap: Voice,Registration
8D 90 20 38 40 64 0A 25 15 84 1C 29 08/19 16:17:41 TDMA (Motorola) Identifier Update - ID: 02 Base: 851.01250 Spacing: 0.01250 Bandwidth: 0.01250 TX Offset: -45.00000 Slots: 2
0D 90 30 A5 80 64 09 15 75 62 C5 AA 08/19 16:17:41 TDMA (Motorola) Identifier Update - ID: 03 Base: 762.00625 Spacing: 0.01250 Bandwidth: 0.01250 TX Offset: 30.00000 Slots: 2
05 90 00 3F 3F 00 00 00 00 00 E8 28 08/19 16:17:41 Unknown Op=05 Mfg 90(Motorola)
B9 00 01 01 17 0E 04 17 36 04 92 34 08/19 16:17:41 Alternate Control Broadcast - Channel 1: 1-1806(773.29375) Cap: Backup control channel only Channel 2: 1-1846(773.54375) Cap: Backup control channel only
09 90 0A 00 00 00 00 00 00 00 A7 C1 08/19 16:17:41 Unknown Op=09 Mfg 90(Motorola) Binary Value: 00001010 00000000
30 00 00 02 6A 00 21 00 09 38 A7 A4 08/19 16:17:41 TDMA Sync Broadcast - 2000/01/01 00:00 (2360) -10
BA 00 00 23 9A 01 01 17 5E 60 87 43 08/19 16:17:41 RFSS Status Broadcast - SysID: 39A Status: Site Trunked Zone: 1 Site: 1 Control: 1-1886(773.79375) Cap: Voice,Registration
3B 00 00 BE E0 03 9A 17 5E 60 25 27 08/19 16:17:42 Network Status Broadcast - WACN: BEE00 Control: 1-1886(773.79375) Cap: Voice,Registration
3D 00 03 22 D0 32 0A 25 10 A2 63 A0 08/19 16:17:42 Identifier Update - ID: 00 Base: 851.00625 Spacing: 0.00625 Bandwidth: 0.00625 TX Offset: -45.00000
BD 00 13 25 E0 32 09 15 75 62 FF 02 08/19 16:17:42 Identifier Update - ID: 01 Base: 762.00625 Spacing: 0.00625 Bandwidth: 0.00625 TX Offset: 30.00000
05 90 00 3F 3F 00 00 00 00 00 E8 28 08/19 16:17:42 Unknown Op=05 Mfg 90(Motorola)
39 00 01 01 17 0E 04 17 36 04 76 00 08/19 16:17:42 Alternate Control Broadcast - Channel 1: 1-1806(773.29375) Cap: Backup control channel only Channel 2: 1-1846(773.54375) Cap: Backup control channel only
89 90 0A 00 00 00 00 00 00 00 43 F5 08/19 16:17:42 Unknown Op=09 Mfg 90(Motorola) Binary Value: 00001010 00000000
30 00 00 02 6A 00 21 00 09 56 2A CC 08/19 16:17:42 TDMA Sync Broadcast - 2000/01/01 00:00 (2390) -10