Here are the freqs that the secret service will be using during the president's visit.I don't think that they are encrypted.The most active frequencies used before and during a presidential or vice presidential visit are Baker, Charlie, Mike, and Tango, as well as any channel designated for use by the WHCA. The frequency used most as a nationwide primary repeater channel is Charlie, followed by Baker.
Alpha 32.2300 WHCA-Transportation (vans) (possible DC base)
Baker 165.7875 USSS-Field Offices, President/VP/VIP security
Charlie 165.3750 USSS-Field Offices/Protection, command post coordination (Nationwide
Primary)
Delta 169.9250 WHCA-Marine Security Detachment, vans
Echo 407.8500 WHCA-SAM Uplink (Air Force 1 phone patch ground uplink)
Foxtrot 415.7000 WHCA-SAM Downlink (Air Force 1 phone patch aircraft downlink)
Golf 166.4000 USSS-Field Offices
165.7625 Input to 165.3750 repeaters
Hotel 167.9000 WHCA-V.P. Staff/White House Garage
165.6875
166.2125 President/VP Security
India 407.9250 USSS-Headquarters (Treasury Security Force)
166.2000
Juliet 170.0000 USSS-Paging/Camp David
Kilo 167.8250 Duplex Phone-Pres Res/LBJ, WHCA
Lima 168.7875 Duplex Phone-Pres Res/LBJ, WHCA (voice scramblers)
Lavender 418.1250 WHCA-Transportation
Mike 165.2125 USSS-Dignitary/Former Pres Protection, Counterfeit Division
November 166.7000 WHCA-White House Staff
Oscar 164.8875 USSS-Presidential Protection Division (PPD), WHCA
Papa 164.4000 USSS-Field Offices/Protection, input to 165.2125 repeaters
Quebec ---
Romeo 166.4000 Input to 165.7875 repeaters
164.4000 USSS-Repeater Outputs
Sierra 166.5125 WHCA-White House Staff
Tango 164.6500 USSS-Field Offices/Protection, Presidential/VP Security
Uniform 361.6000 AF-1 Communications
165.0875
Victor 164.1000 WHCA, Presidential/VP Protection
Whiskey 167.0250 WHCA-Paging
X-ray ******** SEE BELOW
Yankee 162.6875 WHCA-Presidential phone uplink or downlink
Zulu 171.2875 WHCA-Presidential phone downlink or uplink
X-ray is the reserve frequency pool and is not Treasury Common. Frequencies here are used whenever a new frequency is needed.
X-ray frequencies
164.7500
164.8000
165.2625
165.3375
165.4125
165.5125
165.6500
165.6875
165.8500
165.9000
166.0500
166.2000
166.5625
166.5875
166.6375
166.8000
167.9000